Puppy Feeding Calculator by Weight

Puppy Feeding Calculator by Weight: Your Guide to Puppy Nutrition :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-radius: 8px; –shadow: 0 4px 8px 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); margin: 0; padding: 0; display: flex; justify-content: center; padding: 20px; } .container { max-width: 1000px; width: 100%; background-color: #fff; padding: 30px; border-radius: var(–border-radius); box-shadow: var(–shadow); margin: 0 auto; } h1, h2, h3 { color: var(–primary-color); text-align: center; margin-bottom: 20px; } .calculator-section { background-color: var(–background-color); padding: 25px; border-radius: var(–border-radius); margin-bottom: 30px; border: 1px solid #e0e0e0; } .calculator-section h2 { margin-top: 0; } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group select { width: calc(100% – 22px); padding: 10px; border: 1px solid #ccc; border-radius: var(–border-radius); font-size: 1rem; box-sizing: border-box; } .input-group .helper-text { font-size: 0.85rem; color: #6c757d; margin-top: 5px; display: block; } .error-message { color: #dc3545; font-size: 0.85rem; margin-top: 5px; display: none; /* Hidden by default */ } .buttons-container { display: flex; justify-content: space-between; margin-top: 25px; gap: 10px; } .btn { padding: 10px 20px; border: none; border-radius: var(–border-radius); cursor: pointer; font-size: 1rem; transition: background-color 0.3s ease; flex-grow: 1; text-align: center; } .btn-primary { background-color: var(–primary-color); color: white; } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } .results-section { margin-top: 30px; background-color: #e9ecef; padding: 25px; border-radius: var(–border-radius); border: 1px solid #dee2e6; } .results-section h2 { margin-top: 0; color: var(–primary-color); } #main-result { font-size: 2.2rem; font-weight: bold; color: var(–success-color); background-color: #fff; padding: 15px; border-radius: var(–border-radius); text-align: center; margin-bottom: 20px; box-shadow: inset 0 0 10px rgba(0,0,0,0.05); } .intermediate-values { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-bottom: 20px; } .intermediate-value-item { background-color: #fff; padding: 15px; border-radius: var(–border-radius); text-align: center; border: 1px solid #e0e0e0; } .intermediate-value-item strong { display: block; font-size: 1.2rem; color: var(–primary-color); margin-bottom: 5px; } .explanation { font-size: 0.95rem; color: #6c757d; margin-top: 15px; border-top: 1px dashed #ccc; padding-top: 15px; } table { width: 100%; border-collapse: collapse; margin-top: 20px; box-shadow: var(–shadow); } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; } th { background-color: var(–primary-color); color: white; font-weight: bold; } tr:nth-child(even) { background-color: #f2f2f2; } tr:hover { background-color: #e2e2e2; } caption { font-size: 1.1rem; font-weight: bold; color: var(–primary-color); margin-bottom: 10px; text-align: left; } #chartContainer { width: 100%; text-align: center; margin-top: 30px; background-color: #fff; padding: 20px; border-radius: var(–border-radius); box-shadow: var(–shadow); } #chartContainer canvas { max-width: 100%; height: auto; } .article-content { margin-top: 40px; line-height: 1.7; text-align: left; } .article-content h2 { text-align: left; margin-top: 30px; border-bottom: 2px solid var(–primary-color); padding-bottom: 5px; } .article-content h3 { text-align: left; margin-top: 25px; color: #0056b3; } .article-content p, .article-content ul, .article-content ol { margin-bottom: 15px; } .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; } .article-content a:hover { text-decoration: underline; } .faq-item { margin-bottom: 15px; border-left: 3px solid var(–primary-color); padding-left: 15px; } .faq-item strong { color: var(–primary-color); display: block; margin-bottom: 5px; } .copy-btn { background-color: #ffc107; color: #333; } .copy-btn:hover { background-color: #e0a800; } @media (max-width: 768px) { .container { padding: 20px; } .buttons-container { flex-direction: column; } .btn { margin-bottom: 10px; } .intermediate-values { grid-template-columns: 1fr; } }

Puppy Feeding Calculator by Weight

Ensure your puppy gets the right nutrition for healthy growth.

Puppy Food Amount Calculator

Enter your puppy's weight in kilograms (kg).
Puppy (Small Breed, <10kg adult) Puppy (Medium Breed, 10-25kg adult) Puppy (Large Breed, 25kg+ adult) Select the appropriate life stage for accurate feeding guidelines.
Enter the calories per kilogram (kcal/kg) of your puppy's food. (e.g., 3500 kcal/kg)

Your Puppy's Feeding Recommendations

Daily Servings
Morning Portion
Evening Portion
Weekly Food Amount
Formula Used:
The daily food amount is calculated based on the puppy's current weight and life stage, using a standard feeding guideline (e.g., percentage of body weight or calories per kg). This amount is then divided by the total calories per kilogram of the food to determine the grams needed daily. This daily amount is split into morning and evening portions.

Daily Food Amount Trend

Projected daily food amount (grams) based on puppy's weight growth.

What is a Puppy Feeding Calculator by Weight?

A puppy feeding calculator by weight is a specialized tool designed to help dog owners determine the appropriate amount of food to give their growing puppy. Unlike adult dogs, puppies have unique and rapidly changing nutritional requirements to support their development. This puppy feeding calculator by weight takes into account factors such as the puppy's current weight, breed size, and the calorie density of their specific food to provide a tailored feeding recommendation. It simplifies the often confusing task of puppy nutrition, ensuring your furry friend receives adequate calories and nutrients for healthy growth without over or underfeeding. This puppy feeding calculator by weight is an essential resource for new puppy parents.

Who should use it: Any owner of a puppy, from just a few weeks old to around 12-18 months (depending on breed size). It's particularly useful for first-time puppy owners who may be unsure about portion sizes, or for owners who have recently switched their puppy's food to one with a different calorie content. The puppy feeding calculator by weight ensures accuracy.

Common misconceptions:

  • One-size-fits-all: Many owners assume all puppies of the same age eat the same amount. This is untrue due to variations in breed, metabolism, activity level, and food quality. Our puppy feeding calculator by weight addresses this by using weight and life stage.
  • "More is better": Overfeeding a puppy can lead to rapid growth, skeletal issues (especially in large breeds), obesity, and digestive upset. This puppy feeding calculator by weight aims for balanced nutrition.
  • Ignoring food type: Different dog foods have vastly different calorie densities. A high-calorie food requires smaller portions than a low-calorie one. The puppy feeding calculator by weight includes this crucial variable.

Puppy Feeding Calculator by Weight Formula and Mathematical Explanation

The core of our puppy feeding calculator by weight is a straightforward yet effective calculation based on established veterinary nutritional guidelines. It aims to provide the correct daily caloric intake, which is then translated into a specific food portion.

Step-by-step derivation:

  1. Determine Resting Energy Requirement (RER): This is the energy needed for basic bodily functions. For puppies, a common formula is RER (kcal/day) = 70 * (Weight in kg)^0.75.
  2. Determine Daily Energy Requirement (DER): This adjusts RER based on the puppy's life stage and activity. For puppies, a multiplier is applied. A general guideline for puppies is DER = RER * 3.0 (this multiplier can vary slightly based on specific breed recommendations and activity levels). For our puppy feeding calculator by weight, we simplify this by using breed-size specific percentages of body weight or calorie guidelines. A common approach for puppies is a percentage of their *expected adult weight* or a set range of calories per kilogram of *current* weight, which is more practical for a weight-based calculator. For this calculator, we use:
    • Small Breed Puppies: Typically need more calories per unit of body weight. Around 5-6% of current body weight in grams, or a higher kcal/kg range.
    • Medium Breed Puppies: Moderate needs. Around 4-5% of current body weight in grams, or a moderate kcal/kg range.
    • Large Breed Puppies: Need careful calorie control to prevent overly rapid growth. Around 3-4% of current body weight in grams, or a lower kcal/kg range.
    We will use a simplified calculation for demonstration: Daily Food Amount (grams) = (Puppy Weight in kg * Percentage Factor) * 1000 (The Percentage Factor varies by life stage, and our calculator uses industry-standard ranges)
  3. Calculate Daily Food Grams: We use the calculated daily caloric need and divide it by the food's calorie density (kcal/kg) to find the total grams of food per day. Daily Food (grams) = (Daily Caloric Need in kcal) / (Food Calories per kg / 1000 grams/kg)
  4. Calculate Portion Sizes: The daily amount is then typically split into two main meals (morning and evening), assuming a young puppy.
  5. Calculate Weekly Food: Daily amount * 7 days.

Variable Explanations:

Variable Meaning Unit Typical Range / Notes
Puppy Weight Current weight of the puppy Kilograms (kg) 0.1 kg to 50 kg+ (continuously updated as puppy grows)
Life Stage Breed size category affecting growth rate and nutritional needs Category Small Breed (<10kg adult), Medium Breed (10-25kg adult), Large Breed (25kg+ adult)
Food Calorie Density Energy content of the puppy's food kcal/kg 2800 – 4500 kcal/kg (common range for puppy foods)
Daily Food Amount Total grams of food recommended per day Grams (g) Varies widely based on factors above
Daily Servings Number of meals per day Count Typically 2-3 for puppies
Portion Size Amount of food per meal Grams (g) Daily Food Amount / Daily Servings
Weekly Food Amount Total food needed for one week Grams (g) or Kilograms (kg) Daily Food Amount * 7

Practical Examples (Real-World Use Cases)

Let's see the puppy feeding calculator by weight in action:

Example 1: Small Breed Puppy

  • Scenario: Sarah has an 8-week-old Miniature Poodle puppy that currently weighs 1.5 kg. She's using a high-quality puppy food with 3800 kcal/kg.
  • Inputs:
    • Puppy Weight: 1.5 kg
    • Life Stage: Puppy (Small Breed, <10kg adult)
    • Food Calorie Density: 3800 kcal/kg
  • Calculator Output:
    • Primary Result (Daily Food): Approximately 90 grams
    • Intermediate Values: Daily Servings: 2, Morning Portion: 45g, Evening Portion: 45g, Weekly Food: 630g
  • Interpretation: Sarah should feed her small breed puppy about 90 grams of her specific food each day, divided into two 45g meals. This ensures she meets the puppy's high energy needs for rapid growth. She should monitor her puppy's body condition and adjust slightly as needed, and of course, consult her veterinarian.

Example 2: Large Breed Puppy

  • Scenario: Mark is raising a 4-month-old Labrador Retriever puppy that weighs 15 kg. His chosen puppy food contains 3500 kcal/kg. He needs to be careful not to overfeed to promote controlled bone growth.
  • Inputs:
    • Puppy Weight: 15 kg
    • Life Stage: Puppy (Large Breed, 25kg+ adult)
    • Food Calorie Density: 3500 kcal/kg
  • Calculator Output:
    • Primary Result (Daily Food): Approximately 375 grams
    • Intermediate Values: Daily Servings: 2, Morning Portion: 187.5g, Evening Portion: 187.5g, Weekly Food: 2.63 kg
  • Interpretation: Mark's large breed puppy requires around 375 grams of food daily. This translates to roughly 188 grams per meal, twice a day. The puppy feeding calculator by weight helps Mark manage his puppy's intake carefully, crucial for preventing developmental orthopedic diseases common in large breeds. Regular vet check-ups are vital.

How to Use This Puppy Feeding Calculator by Weight

Using our puppy feeding calculator by weight is simple and takes just a few moments. Follow these steps to get accurate feeding recommendations for your puppy:

  1. Step 1: Measure Your Puppy's Weight: Use an accurate scale to weigh your puppy. If you don't have one, your veterinarian's office can assist. Ensure you enter the weight in kilograms (kg).
  2. Step 2: Select Life Stage: Choose the category that best fits your puppy's expected adult size: Small Breed (adult weight under 10kg), Medium Breed (adult weight 10-25kg), or Large Breed (adult weight over 25kg). This selection is critical as nutritional needs differ significantly.
  3. Step 3: Find Your Food's Calorie Density: Locate the feeding guide or nutritional information on your puppy's food bag or packaging. Look for the "calories per kilogram" (kcal/kg) value. Enter this number into the calculator.
  4. Step 4: Click Calculate: Press the "Calculate Feeding Amount" button.

How to read results:

  • Daily Food Amount (Primary Result): This is the total recommended grams of food your puppy should consume each day.
  • Daily Servings: Indicates how many meals the daily total is divided into (usually 2 or 3 for puppies).
  • Morning/Evening Portion: Shows the approximate grams of food for each meal.
  • Weekly Food Amount: Helps you estimate how much food to purchase or have on hand for the week.

Decision-making guidance: Use these calculated amounts as a starting point. Always monitor your puppy's body condition (you should be able to feel their ribs easily but not see them prominently), energy levels, and stool consistency. Adjust portions slightly (e.g., +/- 10%) as needed and consult your veterinarian regularly, especially during rapid growth phases. This puppy feeding calculator by weight is a tool, not a substitute for professional advice.

Key Factors That Affect Puppy Feeding Calculator by Weight Results

While our puppy feeding calculator by weight provides a highly accurate estimate, several factors can influence your puppy's individual nutritional needs. Understanding these can help you fine-tune the feeding plan:

  1. Activity Level: Highly active puppies, those training for sports, or particularly energetic breeds will burn more calories than a sedentary puppy. They may require slightly larger portions than calculated. Conversely, a less active puppy might need less.
  2. Metabolism: Just like humans, dogs have individual metabolic rates. Some puppies naturally process food faster and require more calories, while others are more efficient and need less.
  3. Health Status: Puppies with underlying health conditions (e.g., parasites, malabsorption issues, specific metabolic disorders) will have different caloric and nutrient requirements. Always follow veterinary advice for sick puppies.
  4. Environmental Temperature: In very cold weather, puppies may need slightly more calories to maintain body heat. In extremely hot weather, their appetite might decrease.
  5. Spay/Neuter Status: Post-spay or neuter, a dog's metabolism can slow slightly, potentially requiring a minor reduction in food intake to prevent weight gain. However, this is more relevant for adolescents and adults.
  6. Growth Rate Monitoring: Large breed puppies, in particular, need controlled growth to prevent skeletal problems. Overfeeding can lead to excessively rapid growth. Our puppy feeding calculator by weight aims for a healthy rate, but monitoring your specific puppy's growth curve with your vet is crucial.
  7. Treats and Table Scraps: Any extra calories consumed from treats, chews, or human food should be factored in. Ideally, treats should make up no more than 10% of a puppy's total daily caloric intake. If significant, reduce the main meal portions accordingly.
  8. Food Quality and Digestibility: While calorie density is accounted for, the quality of ingredients impacts nutrient absorption. A highly digestible food means more nutrients are utilized by the puppy.

Frequently Asked Questions (FAQ)

Q1: How often should I feed my puppy using the calculator's results?

A: For most puppies up to 6 months, feeding 2-3 times a day is recommended. The calculator provides a daily total, which you can divide into your preferred meal schedule. Puppies may need more frequent small meals.

Q2: My puppy seems hungry even after eating the calculated amount. What should I do?

A: First, double-check that you entered the correct weight and calorie density. Ensure you're not including too many treats. If hunger persists and your puppy is at a healthy weight, consider slightly increasing the portion by 10% or consult your veterinarian. They can assess if your puppy has higher needs or if it's behavioral.

Q3: My puppy is a mix breed. How do I choose the correct life stage?

A: Estimate your puppy's expected adult weight. If they are likely to be under 10kg, choose 'Small Breed'. If between 10-25kg, choose 'Medium Breed'. If over 25kg, choose 'Large Breed'. When in doubt, lean towards the category that matches the larger parent if known.

Q4: Can I use the puppy feeding calculator by weight for my adult dog?

A: No, this calculator is specifically designed for puppies. Adult dogs have different metabolic rates and nutritional requirements. You would need an adult dog food calculator.

Q5: How accurate is the puppy feeding calculator by weight?

A: The calculator provides a scientifically based estimate using standard veterinary guidelines. However, individual variation is significant. It serves as an excellent starting point, but always monitor your puppy's condition and consult your vet.

Q6: My puppy has a sensitive stomach. Does this affect the amount I should feed?

A: While this calculator focuses on quantity, a sensitive stomach might mean your puppy needs a specific type of food. Consult your veterinarian about the best diet, and then use this puppy feeding calculator by weight to determine the portion size for that recommended food.

Q7: When should I update the puppy's weight in the calculator?

A: You should re-weigh and recalculate using the puppy feeding calculator by weight frequently, especially during the rapid growth phase (first 6-9 months). Weekly or bi-weekly updates are ideal. As they approach adulthood, recalculate monthly.

Q8: What if the food bag has its own feeding guide? Should I ignore it?

A: It's best to compare. The food manufacturer's guide is a good reference, but it might be more generic. Use our puppy feeding calculator by weight with your specific food's calorie density for a potentially more personalized recommendation. If the results differ significantly, discuss with your vet.

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var puppyWeightInput = document.getElementById("puppyWeight"); var lifeStageSelect = document.getElementById("lifeStage"); var foodCaloriesInput = document.getElementById("foodCalories"); var mainResultDisplay = document.getElementById("main-result"); var dailyServingsDisplay = document.getElementById("dailyServings"); var morningPortionDisplay = document.getElementById("morningPortion"); var eveningPortionDisplay = document.getElementById("eveningPortion"); var weeklyFoodDisplay = document.getElementById("weeklyFood"); var puppyWeightError = document.getElementById("puppyWeightError"); var foodCaloriesError = document.getElementById("foodCaloriesError"); var feedingChart; // Declare chart variable globally // Default values for sensible reset var defaultPuppyWeight = 5; // kg var defaultLifeStage = "puppy-medium-breed"; var defaultFoodCalories = 3500; // kcal/kg function calculateFeeding() { // Reset errors puppyWeightError.style.display = "none"; foodCaloriesError.style.display = "none"; var puppyWeight = parseFloat(puppyWeightInput.value); var lifeStage = lifeStageSelect.value; var foodCalories = parseFloat(foodCaloriesInput.value); // — Input Validation — var isValid = true; if (isNaN(puppyWeight) || puppyWeight <= 0) { puppyWeightError.textContent = "Please enter a valid puppy weight (e.g., 5)."; puppyWeightError.style.display = "block"; isValid = false; } if (isNaN(foodCalories) || foodCalories <= 0) { foodCaloriesError.textContent = "Please enter valid calorie density (e.g., 3500)."; foodCaloriesError.style.display = "block"; isValid = false; } if (!isValid) { // Clear results if validation fails mainResultDisplay.textContent = "–"; dailyServingsDisplay.textContent = "–"; morningPortionDisplay.textContent = "–"; eveningPortionDisplay.textContent = "–"; weeklyFoodDisplay.textContent = "–"; updateChart(0); // Clear chart return; } // — Calculation Logic — var dailyFoodGrams = 0; var percentageFactor = 0; // Represents a simplified factor based on life stage // Simplified feeding guidelines based on common recommendations (grams per kg of body weight) // These are illustrative and can be adjusted based on specific vet recommendations or food brands. // Typical ranges: Small breeds ~5-6%, Medium ~4-5%, Large ~3-4% of body weight in grams/kg. // Or, translated to kcal/day: Small ~ 300-400 kcal/kg, Medium ~ 250-300 kcal/kg, Large ~ 200-250 kcal/kg. // We'll use a kcal approach as it directly uses food calories. var kcalPerKgBodyWeight = 0; switch (lifeStage) { case "puppy-small-breed": // Small breeds often need higher calories relative to body weight. ~300-400 kcal/kg kcalPerKgBodyWeight = 350; // Mid-range for illustration break; case "puppy-medium-breed": // Medium breeds have moderate needs. ~250-300 kcal/kg kcalPerKgBodyWeight = 275; // Mid-range for illustration break; case "puppy-large-breed": // Large breeds need controlled growth. ~200-250 kcal/kg kcalPerKgBodyWeight = 225; // Mid-range for illustration break; default: kcalPerKgBodyWeight = 275; // Default to medium if something goes wrong } var targetKcalPerDay = puppyWeight * kcalPerKgBodyWeight; // Calculate daily food amount in grams dailyFoodGrams = (targetKcalPerDay / foodCalories) * 1000; // (kcal / kcal/kg) * (g/kg) = grams // Ensure results are not negative or extremely small due to calculation quirks dailyFoodGrams = Math.max(0, dailyFoodGrams); var dailyServings = 2; // Assume 2 meals for simplicity in this calculator var morningPortion = dailyFoodGrams / dailyServings; var eveningPortion = dailyFoodGrams / dailyServings; var weeklyFood = dailyFoodGrams * 7; // — Display Results — mainResultDisplay.textContent = dailyFoodGrams.toFixed(1) + " g/day"; dailyServingsDisplay.textContent = dailyServings.toString(); morningPortionDisplay.textContent = morningPortion.toFixed(1) + " g"; eveningPortionDisplay.textContent = eveningPortion.toFixed(1) + " g"; weeklyFoodDisplay.textContent = (weeklyFood / 1000).toFixed(2) + " kg"; // — Update Chart — updateChart(dailyFoodGrams); } function resetCalculator() { puppyWeightInput.value = defaultPuppyWeight; lifeStageSelect.value = defaultLifeStage; foodCaloriesInput.value = defaultFoodCalories; // Clear error messages puppyWeightError.style.display = "none"; foodCaloriesError.style.display = "none"; // Trigger calculation to update display calculateFeeding(); } function copyResults() { var resultsText = "Puppy Feeding Recommendations:\n"; resultsText += "———————————-\n"; resultsText += "Daily Food Amount: " + mainResultDisplay.textContent + "\n"; resultsText += "Daily Servings: " + dailyServingsDisplay.textContent + "\n"; resultsText += "Morning Portion: " + morningPortionDisplay.textContent + "\n"; resultsText += "Evening Portion: " + eveningPortionDisplay.textContent + "\n"; resultsText += "Weekly Food Amount: " + weeklyFoodDisplay.textContent + "\n\n"; resultsText += "Key Assumptions:\n"; resultsText += "- Puppy Weight: " + puppyWeightInput.value + " kg\n"; resultsText += "- Life Stage: " + lifeStageSelect.options[lifeStageSelect.selectedIndex].text + "\n"; resultsText += "- Food Calorie Density: " + foodCaloriesInput.value + " kcal/kg\n"; // Create a temporary textarea element to copy text var textarea = document.createElement("textarea"); textarea.value = resultsText; textarea.style.position = "fixed"; // Avoid scrolling to bottom textarea.style.left = "-9999px"; document.body.appendChild(textarea); textarea.focus(); textarea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied!' : 'Copying failed.'; alert(msg); // Simple feedback } catch (err) { alert('Copying failed. Please copy manually.'); } document.body.removeChild(textarea); } // — Charting Logic — function initializeChart() { var ctx = document.getElementById('feedingChart').getContext('2d'); feedingChart = new Chart(ctx, { type: 'line', data: { labels: [], // Will be populated dynamically datasets: [{ label: 'Daily Food (grams)', data: [], // Will be populated dynamically borderColor: 'var(–primary-color)', backgroundColor: 'rgba(0, 74, 153, 0.2)', fill: true, tension: 0.1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Daily Food Amount (grams)' } }, x: { title: { display: true, text: 'Puppy Weight (kg)' } } }, plugins: { legend: { display: true, position: 'top', }, title: { display: true, text: 'Projected Daily Food Needs by Weight' } } } }); } function updateChart(currentDailyFood) { if (!feedingChart) { initializeChart(); } var currentWeight = parseFloat(puppyWeightInput.value); var lifeStage = lifeStageSelect.value; var foodCalories = parseFloat(foodCaloriesInput.value); if (isNaN(currentWeight) || currentWeight <= 0 || isNaN(foodCalories) || foodCalories <= 0) { feedingChart.data.labels = []; feedingChart.data.datasets[0].data = []; feedingChart.update(); return; } // Generate data for a range of weights around the current weight var weightRangeStart = Math.max(0.1, currentWeight * 0.5); // Start from 50% of current weight var weightRangeEnd = currentWeight * 2; // End at 200% of current weight var step = (weightRangeEnd – weightRangeStart) / 10; // Create about 10-11 points var kcalPerKgBodyWeight = 0; switch (lifeStage) { case "puppy-small-breed": kcalPerKgBodyWeight = 350; break; case "puppy-medium-breed": kcalPerKgBodyWeight = 275; break; case "puppy-large-breed": kcalPerKgBodyWeight = 225; break; default: kcalPerKgBodyWeight = 275; } feedingChart.data.labels = []; feedingChart.data.datasets[0].data = []; for (var w = weightRangeStart; w 0) { // Find the closest existing point to maintain order var inserted = false; for (var i = 0; i currentWeight) { feedingChart.data.labels.splice(i, 0, currentWeight.toFixed(1)); feedingChart.data.datasets[0].data.splice(i, 0, currentDailyFood.toFixed(1)); inserted = true; break; } } if (!inserted) { // If it's the largest weight, add to end feedingChart.data.labels.push(currentWeight.toFixed(1)); feedingChart.data.datasets[0].data.push(currentDailyFood.toFixed(1)); } } else if (currentWeightExists && currentDailyFood > 0) { // Update the specific point if it exists var index = feedingChart.data.labels.indexOf(currentWeight.toFixed(1)); if (index !== -1) { feedingChart.data.datasets[0].data[index] = currentDailyFood.toFixed(1); } } feedingChart.update(); } // Initial calculation and chart generation on page load document.addEventListener('DOMContentLoaded', function() { resetCalculator(); // Set defaults and calculate initializeChart(); // Initialize chart structure calculateFeeding(); // Perform initial calculation to populate chart }); // Re-calculate on input change puppyWeightInput.addEventListener('input', calculateFeeding); lifeStageSelect.addEventListener('change', calculateFeeding); foodCaloriesInput.addEventListener('input', calculateFeeding);

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