Maltese Puppy Weight Calculator

Maltese Puppy Weight Calculator: Predict Your Puppy's Adult Size :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ddd; –shadow-color: rgba(0, 0, 0, 0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; } .container { max-width: 1000px; margin: 20px auto; padding: 20px; background-color: #fff; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); } h1, h2, h3 { color: var(–primary-color); text-align: center; } h1 { margin-bottom: 15px; } h2 { margin-top: 30px; margin-bottom: 15px; border-bottom: 2px solid var(–primary-color); padding-bottom: 5px; } .calculator-wrapper { background-color: #fff; padding: 25px; border-radius: 8px; box-shadow: 0 2px 10px var(–shadow-color); margin-bottom: 30px; } .loan-calc-container { display: flex; flex-direction: column; gap: 15px; } .input-group { display: flex; flex-direction: column; margin-bottom: 15px; } .input-group label { font-weight: bold; margin-bottom: 5px; color: var(–primary-color); } .input-group input[type="number"], .input-group select { padding: 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1rem; transition: border-color 0.3s ease; } .input-group input[type="number"]:focus, .input-group select:focus { border-color: var(–primary-color); outline: none; box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; } .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; justify-content: space-between; margin-top: 20px; gap: 10px; } .button-group button { padding: 12px 20px; border: none; border-radius: 5px; font-size: 1rem; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; flex: 1; /* Distribute space equally */ } .button-group button.primary { background-color: var(–primary-color); color: white; } .button-group button.primary:hover { background-color: #003366; transform: translateY(-2px); } .button-group button.secondary { background-color: #6c757d; color: white; } .button-group button.secondary:hover { background-color: #5a6268; transform: translateY(-2px); } .results-wrapper { margin-top: 30px; padding: 20px; border: 1px solid var(–border-color); border-radius: 8px; background-color: #e9ecef; } .results-wrapper h3 { color: var(–primary-color); margin-top: 0; margin-bottom: 15px; } .result-item { margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px dashed var(–border-color); } .result-item:last-child { border-bottom: none; } .result-label { font-weight: bold; color: var(–primary-color); } .result-value { font-weight: bold; font-size: 1.1em; } .primary-result { background-color: var(–success-color); color: white; padding: 15px; border-radius: 5px; text-align: center; font-size: 1.4em; font-weight: bold; margin-bottom: 20px; box-shadow: 0 2px 5px rgba(40, 167, 69, 0.3); } .formula-explanation { font-size: 0.9em; color: #6c757d; margin-top: 15px; text-align: center; } table { width: 100%; border-collapse: collapse; margin-top: 20px; margin-bottom: 30px; } th, td { padding: 10px; text-align: left; border: 1px solid var(–border-color); } th { background-color: var(–primary-color); color: white; font-weight: bold; } tr:nth-child(even) { background-color: #f2f2f2; } caption { font-size: 1.1em; font-weight: bold; color: var(–primary-color); margin-bottom: 10px; caption-side: top; text-align: left; } #chartContainer { width: 100%; height: 300px; margin-top: 20px; display: flex; justify-content: center; align-items: center; border: 1px solid var(–border-color); border-radius: 8px; background-color: #fdfdfd; } .article-content { margin-top: 40px; background-color: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px var(–shadow-color); } .article-content h2, .article-content h3 { text-align: left; color: var(–primary-color); margin-top: 25px; } .article-content h2 { border-bottom: 2px solid var(–primary-color); padding-bottom: 5px; } .article-content p, .article-content ul, .article-content ol { margin-bottom: 15px; color: var(–text-color); } .article-content ul, .article-content ol { padding-left: 25px; } .article-content li { margin-bottom: 8px; } .article-content a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .article-content a:hover { text-decoration: underline; } .faq-item { margin-bottom: 15px; padding: 10px; background-color: #f8f9fa; border-radius: 5px; border-left: 3px solid var(–primary-color); } .faq-item strong { display: block; color: var(–primary-color); margin-bottom: 5px; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 15px; padding-bottom: 10px; border-bottom: 1px dashed var(–border-color); } .related-links li:last-child { border-bottom: none; } .related-links a { font-weight: bold; font-size: 1.1em; } .related-links span { display: block; font-size: 0.9em; color: #6c757d; margin-top: 3px; } .canvas-container { position: relative; width: 100%; height: 300px; margin-top: 20px; border: 1px solid var(–border-color); border-radius: 8px; background-color: #fdfdfd; } /* Responsive adjustments */ @media (min-width: 768px) { .container { margin: 30px auto; padding: 30px; } .button-group { justify-content: flex-start; } .button-group button { flex: unset; /* Reset flex for larger screens if needed */ min-width: 150px; } }

Maltese Puppy Weight Calculator

Estimate your Maltese puppy's future adult weight based on current age and weight.

Maltese Puppy Weight Predictor

Enter the age of your Maltese puppy in whole or fractional weeks (e.g., 12 or 12.5).
Enter the current weight of your Maltese puppy in kilograms.
Female Male Select your puppy's gender. Males tend to be slightly heavier.
Estimate the average weight of the puppy's parents (e.g., 2.5 for 2.5kg). This is a key indicator.

Estimated Adult Weight

— kg

Key Growth Indicators:

Estimated Weight at 6 Months (kg):
Estimated Weight at 1 Year (kg):
Growth Factor Applied:

Formula uses a combination of current age/weight, gender, and parent size, applying a standard growth curve multiplier adjusted for breed norms.

Maltese Puppy Growth Stages
Age (Weeks) Predicted Weight (kg) Growth Stage

What is a Maltese Puppy Weight Calculator?

A Maltese puppy weight calculator is a specialized online tool designed to help potential and current Maltese dog owners estimate the adult weight of their puppy. Maltese dogs are a small toy breed, and understanding their potential adult size is crucial for proper care, feeding, training, and health management. This calculator takes into account various factors like the puppy's current age, its current weight, its gender, and the average weight of its parents to provide a realistic prediction. It's a valuable resource for anyone wanting to prepare for their tiny companion's full-grown stature.

Who should use it: This calculator is primarily for new Maltese puppy owners, breeders assessing potential litters, and individuals considering adopting a Maltese puppy. It's useful for gaining insight into whether a puppy is on track for a healthy adult weight range.

Common misconceptions: A common misconception is that a puppy's adult weight is solely determined by its current weight or parent's weight. While these are significant factors, a Maltese puppy weight calculator acknowledges the complex interplay of genetics, nutrition, and overall health. Another misconception is that all Maltese dogs will reach an identical weight; individual variations are normal.

Maltese Puppy Weight Calculator Formula and Mathematical Explanation

The Maltese puppy weight calculator employs a multi-factor approach to predict adult weight. It's not a single, simple linear equation but rather a model that integrates several key data points. The core idea is to leverage the puppy's current growth trajectory and genetic predispositions.

The general approach involves establishing a baseline from the parent's average weight and then adjusting based on the puppy's current age and weight relative to expected breed growth curves.

Step-by-step derivation (simplified model):

  1. Base Weight Estimation: Start with the average weight of the parents. This provides a genetic target.
  2. Age & Current Weight Adjustment: Compare the puppy's current weight and age to typical Maltese growth charts. Puppies that are heavier or lighter than average for their age will have their prediction adjusted. A common method involves projecting current growth rate. For younger puppies (under 16 weeks), formulas often extrapolate current weight. For older puppies, a smaller adjustment is made as they approach maturity.
  3. Gender Factor: Male Maltese dogs are typically slightly larger and heavier than females. A small percentage (e.g., 5-10%) is added for males.
  4. Growth Factor Calculation: A "Growth Factor" is derived, representing how much the puppy is expected to grow from its current size to its adult size. This factor is influenced by how close the puppy is to its expected adult weight based on genetics (parental average). If a puppy is already close to the parent average at a young age, the growth factor will be smaller.
  5. Weight Projection: The current weight is multiplied by the calculated Growth Factor to arrive at the predicted adult weight. For intermediate predictions (e.g., 6 months, 1 year), standard breed growth curves are used, interpolating between known points.

Variable Explanations:

Variables Used in the Maltese Puppy Weight Calculator
Variable Meaning Unit Typical Range
Puppy's Current Age (Weeks) The age of the Maltese puppy in weeks at the time of measurement. Weeks (wk) 1 – 20 weeks (primary prediction range)
Puppy's Current Weight (kg) The measured weight of the puppy. Kilograms (kg) 0.5 – 3.0 kg
Puppy's Gender Biological sex of the puppy. Categorical (Male/Female) Male, Female
Average Parent Weight (kg) The average weight of the puppy's dam (mother) and sire (father). Kilograms (kg) 2.0 – 4.0 kg
Predicted Adult Weight (kg) The estimated final weight of the Maltese dog. Kilograms (kg) 2.0 – 4.0 kg
Growth Factor A multiplier indicating how much more the puppy is expected to grow. Unitless 1.1 – 2.5

Practical Examples (Real-World Use Cases)

Let's illustrate how the Maltese puppy weight calculator works with practical scenarios.

Example 1: Young Puppy, Average Size

Scenario: Sarah has a 10-week-old female Maltese puppy named Luna. Luna currently weighs 1.2 kg. Sarah knows Luna's mother weighs 2.8 kg and her father weighs 3.2 kg.

Inputs:

  • Puppy's Current Age: 10 weeks
  • Puppy's Current Weight: 1.2 kg
  • Puppy's Gender: Female
  • Average Parent Weight: (2.8 + 3.2) / 2 = 3.0 kg

Calculator Output (Hypothetical):

  • Predicted Adult Weight: 3.1 kg
  • Estimated Weight at 6 Months: 2.7 kg
  • Estimated Weight at 1 Year: 3.0 kg
  • Growth Factor Applied: 2.58

Interpretation: Luna is currently a healthy weight for her age. The calculator predicts she will reach an adult weight of around 3.1 kg, which is within the typical range for a Maltese, slightly higher than the average parent weight, suggesting good genetic potential.

Example 2: Older Puppy, Smaller Parentage

Scenario: Mark is fostering an 18-week-old male Maltese puppy named Pip. Pip weighs 1.8 kg. Pip's known parents were both on the smaller side, around 2.3 kg each.

Inputs:

  • Puppy's Current Age: 18 weeks
  • Puppy's Current Weight: 1.8 kg
  • Puppy's Gender: Male
  • Average Parent Weight: (2.3 + 2.3) / 2 = 2.3 kg

Calculator Output (Hypothetical):

  • Predicted Adult Weight: 2.6 kg
  • Estimated Weight at 6 Months: 2.4 kg
  • Estimated Weight at 1 Year: 2.5 kg
  • Growth Factor Applied: 1.44

Interpretation: Pip is nearing his final growth stages. The calculator indicates he is on track to reach an adult weight of approximately 2.6 kg. This prediction is slightly higher than the average parent weight, possibly accounting for the male gender and a slight upward adjustment typical for puppies that might not have received optimal nutrition earlier. The lower growth factor reflects that most growth is already complete.

How to Use This Maltese Puppy Weight Calculator

Using the Maltese puppy weight calculator is straightforward and can provide valuable insights into your puppy's development.

  1. Input Current Age: Accurately determine your puppy's age in weeks. If you're unsure, consult your vet or adoption records. Enter this value in the "Puppy's Current Age (Weeks)" field.
  2. Input Current Weight: Weigh your puppy using a reliable scale (a kitchen or postal scale can work well for small puppies). Enter the weight in kilograms (kg) into the "Puppy's Current Weight (kg)" field.
  3. Select Gender: Choose whether your puppy is male or female from the dropdown menu.
  4. Input Average Parent Weight: If known, enter the approximate weight of both the mother and father dog in kilograms. If you only know one parent's weight, you can enter it twice or use a typical Maltese weight (around 3kg) as an estimate. A more accurate parent average yields a better result.
  5. Click 'Calculate': Press the "Calculate" button. The tool will process your inputs.
  6. Review Results: The calculator will display:
    • Primary Result: The main predicted adult weight.
    • Key Growth Indicators: Estimated weights at 6 months and 1 year, providing context for growth milestones.
    • Growth Factor: An indicator of how much more the puppy is expected to grow.
    • Chart & Table: Visualizations of the predicted growth curve.
  7. Interpret the Data: Compare the predicted adult weight to the standard breed range (typically 2-4 kg for Maltese). If the prediction seems significantly outside this range, or if your puppy's current weight is very different from expected for its age, it might be worth consulting your veterinarian.
  8. Use 'Reset' and 'Copy': Use the "Reset" button to clear all fields and start over. The "Copy Results" button allows you to easily save or share the calculated data.

Decision-making guidance: This calculator is a predictive tool, not a diagnostic one. Use the results to anticipate future needs (e.g., larger beds, different food portions) and to monitor your puppy's growth trends. Consistent deviations from expected growth patterns, regardless of the prediction, should prompt a veterinary discussion.

Key Factors That Affect Maltese Puppy Weight Results

While the Maltese puppy weight calculator provides an estimate, several real-world factors can influence a puppy's actual adult weight. Understanding these helps in interpreting the calculator's output.

  • Genetics: This is the most significant factor. The parent's size is a primary input, but subtle genetic variations can still lead to puppies being larger or smaller than predicted based on parental averages. Some puppies may inherit genes for size from distant ancestors.
  • Nutrition and Diet: A balanced, high-quality diet appropriate for a growing puppy is essential. Overfeeding can lead to obesity and potentially higher adult weight, while underfeeding can stunt growth. The calculator assumes a reasonably well-nourished puppy.
  • Health and Veterinary Care: Underlying health conditions, parasites, or metabolic issues can affect a puppy's growth rate and final weight. Regular vet check-ups ensure your puppy is healthy and growing appropriately. The calculator cannot account for specific medical conditions.
  • Spaying/Neutering: Hormonal changes associated with spaying or neutering can sometimes influence metabolism and body composition, potentially affecting weight management in adulthood. The exact impact varies between individuals.
  • Activity Level: While Maltese are small, a highly active puppy might have a slightly leaner build compared to a more sedentary one, even if their predicted weights are similar. This impacts body composition more than skeletal frame size.
  • Age Accuracy: The accuracy of the age input is critical, especially for younger puppies where growth is rapid. Small errors in age estimation can lead to noticeable differences in the predicted outcome.
  • Individual Metabolism: Just like humans, each dog has a unique metabolism. Some dogs naturally process food more efficiently or burn calories faster than others, influencing their final weight.

Frequently Asked Questions (FAQ)

Q1: What is the ideal adult weight for a Maltese?

A: According to breed standards, Maltese dogs typically weigh between 2 to 4 kilograms (approximately 4 to 9 pounds). The calculator aims to predict where your puppy will fall within this range.

Q2: My puppy is currently much smaller/larger than the calculator predicts. Should I worry?

A: The calculator provides an estimate based on common factors. If your puppy's current weight is significantly outside the expected range for its age (check breed growth charts), or if the predicted adult weight is drastically different from the breed standard, it's advisable to consult your veterinarian. They can assess your puppy's individual growth curve and overall health.

Q3: How accurate is this Maltese puppy weight calculator?

A: The calculator offers a good prediction based on established patterns and inputs like parent size. However, individual genetics, diet, and health can cause variations. It's a tool for estimation and monitoring, not a definitive prediction.

Q4: Does the parent's weight directly determine the puppy's weight?

A: It's a major factor, but not the only one. Genetics are complex, and other factors like the puppy's gender, nutrition, and overall health play significant roles. The calculator balances these elements.

Q5: My puppy's parents have very different weights. How should I calculate the average parent weight?

A: Simply add their weights together and divide by two. For example, if one parent is 2.5 kg and the other is 3.5 kg, the average is (2.5 + 3.5) / 2 = 3.0 kg. The calculator uses this average.

Q6: How often should I weigh my Maltese puppy?

A: For puppies under 6 months, weekly or bi-weekly weigh-ins are recommended to track growth. Once they are older or reach adulthood, monthly or quarterly checks are usually sufficient. This calculator can be used periodically to compare actual weight against predicted milestones.

Q7: Can this calculator predict weight for other small breeds?

A: While the general principles of growth prediction apply, this specific calculator is tailored with parameters (parent weight ranges, growth curves) optimized for the Maltese breed. For other breeds, a breed-specific calculator would be more accurate. You might find similar tools for [Teacup Poodle Growth Stages](https://example.com/teacup-poodle-growth).

Q8: What if I don't know the parent's weight?

A: If parent weights are unknown, you can use the typical average weight for a Maltese, which is around 3.0 kg. However, the prediction accuracy will be reduced. You can also try to get information from the breeder or previous owner. Exploring [Maltese Breed Standards](https://example.com/maltese-breed-standards) might give you a general idea.

© 2023 Your Website Name. All rights reserved.

// Global variables for chart data var chartInstance = null; var chartData = { labels: [], datasets: [{ label: 'Predicted Weight (kg)', data: [], borderColor: 'var(–primary-color)', backgroundColor: 'rgba(0, 74, 153, 0.1)', fill: true, tension: 0.1 }, { label: 'Parent Average Weight (kg)', data: [], borderColor: '#28a745', backgroundColor: 'rgba(40, 167, 69, 0.1)', fill: false, tension: 0.1, borderDash: [5, 5] }] }; function validateInput(id, min, max, message) { var inputElement = document.getElementById(id); var errorElement = document.getElementById(id + 'Error'); var value = parseFloat(inputElement.value); if (isNaN(value) || value <= 0) { errorElement.textContent = 'Please enter a valid positive number.'; errorElement.style.display = 'block'; return false; } if (value max) { errorElement.textContent = message || ('Maximum value is ' + max + '.'); errorElement.style.display = 'block'; return false; } errorElement.textContent = "; errorElement.style.display = 'none'; return true; } function calculateWeight() { // Clear previous errors document.getElementById('ageError').style.display = 'none'; document.getElementById('weightError').style.display = 'none'; document.getElementById('parentWeightError').style.display = 'none'; // Validate inputs var validAge = validateInput('puppyAgeWeeks', 1, null, 'Age must be at least 1 week.'); var validWeight = validateInput('puppyCurrentWeight', 0.1, null, 'Weight must be at least 0.1 kg.'); var validParentWeight = validateInput('parentWeightAvg', 1.0, 5.0, 'Parent weight should typically be between 1.0 and 5.0 kg.'); // Broad range for small dogs if (!validAge || !validWeight || !validParentWeight) { return; } var puppyAgeWeeks = parseFloat(document.getElementById('puppyAgeWeeks').value); var puppyCurrentWeight = parseFloat(document.getElementById('puppyCurrentWeight').value); var puppyGender = document.getElementById('puppyGender').value; var parentWeightAvg = parseFloat(document.getElementById('parentWeightAvg').value); var predictedAdultWeight; var weightAt6Months; var weightAt1Year; var growthFactor; var MALE_ADJUSTMENT_FACTOR = 1.08; // Males tend to be ~8% heavier var PUPPY_MATURITY_AGE_WEEKS = 48; // Approximate age of skeletal maturity // — Core Calculation Logic — // Adjust parent average for gender if only one parent's weight is known or if they differ significantly var effectiveParentWeight = parentWeightAvg; if (puppyGender === 'male') { effectiveParentWeight *= MALE_ADJUSTMENT_FACTOR; } // Simplified approach: Project growth based on current age/weight relative to parent average // This model is heuristic and balances different inputs. if (puppyAgeWeeks <= 12) { // Young puppy stage, heavier reliance on current growth rate // Estimate weight at maturity based on current ratio, capped by parent average adjusted for gender var currentRatio = puppyCurrentWeight / puppyAgeWeeks; // Weight per week var projectedAdultWeightFromCurrent = currentRatio * PUPPY_MATURITY_AGE_WEEKS; // Blend current projection with parent average, giving more weight to parent average as puppy gets older var blendFactor = Math.max(0, Math.min(1, (puppyAgeWeeks – 4) / 8)); // Blend factor increases from 0 at 4 weeks to 1 at 12 weeks predictedAdultWeight = puppyCurrentWeight + (effectiveParentWeight – puppyCurrentWeight) * (1 – blendFactor) * 0.8; // Crude projection factor predictedAdultWeight = Math.max(puppyCurrentWeight * 1.5, Math.min(effectiveParentWeight * 1.2, projectedAdultWeightFromCurrent * 0.9)); // Cap based on parent average and projection predictedAdultWeight = Math.min(predictedAdultWeight, effectiveParentWeight * 1.15); // Ensure not excessively over parent average } else if (puppyAgeWeeks < 30) { // Adolescent stage, closer to mature weight // Use a formula that's more sensitive to parent average and less to current rapid growth var ageFactor = Math.max(0.1, (PUPPY_MATURITY_AGE_WEEKS – puppyAgeWeeks) / PUPPY_MATURITY_AGE_WEEKS); predictedAdultWeight = puppyCurrentWeight + (effectiveParentWeight – puppyCurrentWeight) * ageFactor * 0.7; // Adjusting remaining growth projection predictedAdultWeight = Math.min(predictedAdultWeight, effectiveParentWeight * 1.1); // Cap slightly above parent average predictedAdultWeight = Math.max(predictedAdultWeight, puppyCurrentWeight * 1.1); // Ensure some growth } else { // Near maturity, minimal change expected predictedAdultWeight = puppyCurrentWeight + (effectiveParentWeight – puppyCurrentWeight) * 0.1; // Minimal adjustment predictedAdultWeight = Math.max(predictedAdultWeight, puppyCurrentWeight * 1.05); // Allow small increase predictedAdultWeight = Math.min(predictedAdultWeight, effectiveParentWeight * 1.05); // Cap near parent average } // Final adjustments for breed standard range predictedAdultWeight = Math.max(2.0, Math.min(4.0, predictedAdultWeight)); // Clamp within Maltese standard range (2-4 kg) // Calculate intermediate values var ageAt6Months = 24; // Approximate weeks var ageAt1Year = 52; // Approximate weeks // Estimate weight at 6 months and 1 year using a simplified growth curve model // These are rough interpolations based on typical breed growth var growthCurve6Months = 0.75; // Approx 75% of adult weight by 6 months var growthCurve1Year = 0.95; // Approx 95% of adult weight by 1 year weightAt6Months = predictedAdultWeight * growthCurve6Months; weightAt1Year = predictedAdultWeight * growthCurve1Year; // Recalculate based on current inputs for intermediate predictions if puppy is older than milestone if (puppyAgeWeeks < ageAt6Months) { weightAt6Months = puppyCurrentWeight + (predictedAdultWeight * growthCurve6Months – puppyCurrentWeight) * (ageAt6Months – puppyAgeWeeks) / (ageAt6Months – puppyAgeWeeks + 5); // Crude projection weightAt6Months = Math.max(puppyCurrentWeight, weightAt6Months); // Ensure not decreasing weightAt6Months = Math.min(weightAt6Months, predictedAdultWeight * growthCurve6Months); // Cap at 6 month milestone target } else { weightAt6Months = Math.min(predictedAdultWeight * growthCurve6Months, puppyCurrentWeight); // If older, it's the milestone target or current weight if higher weightAt6Months = Math.max(weightAt6Months, 2.0 * growthCurve6Months); // Ensure minimum } if (puppyAgeWeeks < ageAt1Year) { weightAt1Year = puppyCurrentWeight + (predictedAdultWeight * growthCurve1Year – puppyCurrentWeight) * (ageAt1Year – puppyAgeWeeks) / (ageAt1Year – puppyAgeWeeks + 10); // Crude projection weightAt1Year = Math.max(puppyCurrentWeight, weightAt1Year); // Ensure not decreasing weightAt1Year = Math.min(weightAt1Year, predictedAdultWeight * growthCurve1Year); // Cap at 1 year milestone target } else { weightAt1Year = Math.min(predictedAdultWeight * growthCurve1Year, puppyCurrentWeight); // If older, it's the milestone target or current weight if higher weightAt1Year = Math.max(weightAt1Year, 2.0 * growthCurve1Year); // Ensure minimum } // Calculate Growth Factor (how much more they are expected to grow) growthFactor = predictedAdultWeight / puppyCurrentWeight; if (growthFactor < 1) growthFactor = 1; // Cannot shrink // — Update Display — document.getElementById('primaryResult').textContent = predictedAdultWeight.toFixed(2) + ' kg'; document.getElementById('weightAt6Months').textContent = weightAt6Months.toFixed(2); document.getElementById('weightAt1Year').textContent = weightAt1Year.toFixed(2); document.getElementById('growthFactor').textContent = growthFactor.toFixed(2); // — Update Table and Chart — updateChartAndTable(predictedAdultWeight, parentWeightAvg, puppyGender); } function updateChartAndTable(predictedAdultWeight, parentWeightAvg, puppyGender) { var canvas = document.getElementById('weightChart'); var ctx = canvas.getContext('2d'); // Clear previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } var tableBody = document.getElementById('growthTable').getElementsByTagName('tbody')[0]; tableBody.innerHTML = ''; // Clear existing rows var maxWeeksForChart = 60; // Show growth up to approx 1 year + buffer var agePoints = [4, 8, 12, 16, 20, 24, 30, 36, 48, 52, 60]; // Key points for chart & table var dataPoints = []; var tableRows = []; var effectiveParentWeight = parentWeightAvg * (puppyGender === 'male' ? 1.08 : 1.0); var weightAt6MonthsTarget = predictedAdultWeight * 0.75; var weightAt1YearTarget = predictedAdultWeight * 0.95; var matureWeightTarget = predictedAdultWeight; for (var i = 0; i < agePoints.length; i++) { var weeks = agePoints[i]; var predictedWeight; var growthStage = ""; if (weeks <= 16) { // Puppyhood – rapid growth // Use a sigmoid-like curve for smoother growth in early stages var timeRatio = weeks / 16; predictedWeight = 2.0 + (weightAt6MonthsTarget – 2.0) * Math.pow(timeRatio, 1.5); // Starting from ~2kg } else if (weeks <= 36) { // Adolescent growth var timeRatio = (weeks – 16) / (36 – 16); predictedWeight = weightAt6MonthsTarget + (weightAt1YearTarget – weightAt6MonthsTarget) * Math.pow(timeRatio, 1.2); } else { // Approaching maturity var timeRatio = (weeks – 36) / (60 – 36); predictedWeight = weightAt1YearTarget + (matureWeightTarget – weightAt1YearTarget) * timeRatio * 0.5; // Slower growth towards mature weight predictedWeight = Math.min(predictedWeight, matureWeightTarget); // Don't exceed mature weight } predictedWeight = Math.max(2.0, predictedWeight); // Ensure minimum weight predictedWeight = Math.min(predictedWeight, 4.0); // Ensure maximum weight dataPoints.push(parseFloat(predictedWeight.toFixed(2))); // Determine Growth Stage for table if (weeks < 16) growthStage = "Rapid Growth"; else if (weeks < 30) growthStage = "Adolescent Growth"; else if (weeks < 52) growthStage = "Nearing Maturity"; else growthStage = "Adult"; // Add row to table tableRows.push({ weeks: weeks, weight: predictedWeight.toFixed(2), stage: growthStage }); } // Populate table tableRows.forEach(function(row) { var newRow = tableBody.insertRow(); var cell1 = newRow.insertCell(0); var cell2 = newRow.insertCell(1); var cell3 = newRow.insertCell(2); cell1.textContent = row.weeks; cell2.textContent = row.weight; cell3.textContent = row.stage; }); chartData.labels = agePoints.map(function(w) { return w + 'w'; }); chartData.datasets[0].data = dataPoints; // Add parent average line – fixed value for simplicity in this context var parentAvgData = []; for (var i = 0; i < agePoints.length; i++) { parentAvgData.push(effectiveParentWeight); } chartData.datasets[1].data = parentAvgData; chartData.datasets[1].label = 'Adjusted Parent Avg (' + effectiveParentWeight.toFixed(2) + ' kg)'; // Create the chart var chartOptions = { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: false, title: { display: true, text: 'Weight (kg)' } }, x: { title: { display: true, text: 'Age (Weeks)' } } }, plugins: { title: { display: true, text: 'Predicted Maltese Growth Curve' }, legend: { position: 'top' } } }; // Use Chart.js if available globally, otherwise fallback or skip if (typeof Chart !== 'undefined') { chartInstance = new Chart(ctx, { type: 'line', data: chartData, options: chartOptions }); } else { // Basic fallback or message if Chart.js is not loaded console.warn("Chart.js not loaded. Chart will not be displayed."); document.getElementById('chartContainer').innerHTML = 'Chart could not be loaded. Please ensure Chart.js is included.'; } } function resetForm() { document.getElementById('puppyAgeWeeks').value = 12; document.getElementById('puppyCurrentWeight').value = 1.5; document.getElementById('puppyGender').value = 'female'; document.getElementById('parentWeightAvg').value = 3.0; // Clear results and errors document.getElementById('primaryResult').textContent = '– kg'; document.getElementById('weightAt6Months').textContent = '–'; document.getElementById('weightAt1Year').textContent = '–'; document.getElementById('growthFactor').textContent = '–'; document.getElementById('ageError').style.display = 'none'; document.getElementById('weightError').style.display = 'none'; document.getElementById('parentWeightError').style.display = 'none'; // Clear chart and table if (chartInstance) { chartInstance.destroy(); chartInstance = null; } var tableBody = document.getElementById('growthTable').getElementsByTagName('tbody')[0]; tableBody.innerHTML = ''; document.getElementById('chartContainer').innerHTML = ''; // Re-init canvas // Optionally, recalculate with default values calculateWeight(); } function copyResults() { var primaryResult = document.getElementById('primaryResult').textContent; var weightAt6Months = document.getElementById('weightAt6Months').textContent; var weightAt1Year = document.getElementById('weightAt1Year').textContent; var growthFactor = document.getElementById('growthFactor').textContent; var parentWeightAvgInput = document.getElementById('parentWeightAvg').value; var puppyGenderInput = document.getElementById('puppyGender').value; var assumptions = "Assumptions:\n"; assumptions += "- Parent Average Weight: " + parentWeightAvgInput + " kg\n"; assumptions += "- Puppy Gender: " + (puppyGenderInput.charAt(0).toUpperCase() + puppyGenderInput.slice(1)) + "\n"; var resultsText = "Maltese Puppy Weight Prediction:\n\n"; resultsText += "Predicted Adult Weight: " + primaryResult + "\n"; resultsText += "Estimated Weight at 6 Months: " + weightAt6Months + " kg\n"; resultsText += "Estimated Weight at 1 Year: " + weightAt1Year + " kg\n"; resultsText += "Growth Factor: " + growthFactor + "\n\n"; resultsText += assumptions; // Use Clipboard API navigator.clipboard.writeText(resultsText).then(function() { // Success feedback var copyButton = document.querySelector('button.primary[onclick="copyResults()"]'); copyButton.textContent = 'Copied!'; copyButton.style.backgroundColor = '#28a745'; // Success color setTimeout(function() { copyButton.textContent = 'Copy Results'; copyButton.style.backgroundColor = 'var(–primary-color)'; }, 2000); }).catch(function(err) { console.error('Could not copy text: ', err); // Fallback for older browsers or environments where clipboard API is restricted alert("Could not copy results. Please manually select and copy the text above."); }); } // Initial calculation on page load with default values window.onload = function() { // Check if Chart.js is available before attempting to initialize if (typeof Chart !== 'undefined') { calculateWeight(); // Perform initial calculation to populate chart/table } else { console.warn("Chart.js library not found. Chart will not be displayed."); // Optionally display a message to the user document.getElementById('chartContainer').innerHTML = 'Chart functionality requires the Chart.js library, which could not be loaded.'; } };

Leave a Comment