Determine the healthy weight range for your St. Bernard based on age and visual assessment.
Enter the age of your St. Bernard in months.
1 – Underweight (Ribs, spine, pelvis easily visible)
2 – Ideal (Ribs palpable with slight fat cover, waist visible from above)
3 – Overweight (Ribs palpable only with firm pressure, waist less visible)
4 – Obese (Ribs difficult to feel, no waist visible)
Assess your dog's body fat levels. Select the closest description.
Enter your St. Bernard's current weight in pounds.
—
Estimated Ideal Weight Range (lbs)
The ideal weight range is estimated based on breed standards for adult St. Bernards, adjusted by your Body Condition Score (BCS) and age. Adult ideal weight is typically 120-180 lbs. Puppies' ideal weight grows linearly until maturity. BCS adjusts this range: lower BCS means a lower target, higher BCS means a higher target within the healthy spectrum.
Projected Weight Growth Curve and Healthy Range
What is a St. Bernard Weight Calculator?
A St. Bernard weight calculator is a specialized online tool designed to help St. Bernard owners estimate the healthy weight range for their beloved giant breed dog. Unlike general dog weight calculators, this tool is tailored to the unique growth patterns and mature sizes of St. Bernards, considering factors like age and body condition. It serves as a quick reference to ensure your St. Bernard is neither underweight nor overweight, which are crucial for their long-term health and well-being.
Who should use it:
New St. Bernard owners trying to understand breed norms.
Owners of St. Bernard puppies who want to track their growth against expected milestones.
Owners of adult St. Bernards who want to assess their current condition and identify potential weight issues.
Veterinarians or vet techs looking for a quick reference tool.
Common misconceptions:
"Bigger is always better": While St. Bernards are large dogs, excessive weight can lead to serious health problems like joint issues, heart disease, and diabetes. This calculator helps find the *healthy* big, not just the biggest.
"All St. Bernards weigh X lbs": Weight can vary significantly due to genetics, diet, activity level, and sex. This tool provides a range, not a single exact number.
"My puppy is small for its age, it's fine": While puppies grow at different rates, significantly deviating from expected growth curves can indicate underlying health issues that a calculator can help flag for a vet consultation.
St. Bernard Weight Formula and Mathematical Explanation
The core of the St. Bernard weight calculator relies on a formula that estimates a healthy weight range based on age and a visual assessment of the dog's Body Condition Score (BCS). For adult dogs, a standard range is used, while for puppies, a growth curve is approximated.
Adult Weight Estimation:
For St. Bernards aged 18 months and older, we use a standard target range, adjusted slightly by BCS.
Note: The adjustment for BCS 4 (Obese) is more aggressive to encourage weight loss.
Puppy Weight Estimation:
For puppies under 18 months, we estimate a growth trajectory. The formula approximates a linear growth rate from an average puppy weight (e.g., 20 lbs at 2 months) to the lower end of the adult range by 18 months.
Approximate Puppy Growth Formula (Simplified):
Estimated Weight = Initial Puppy Weight + (Age in Months - Initial Age) * Monthly Gain
Where 'Monthly Gain' is calculated to reach the adult lower bound (120 lbs) by 18 months.
The calculator then defines a range around this estimated weight, also influenced by BCS.
Weight Status Determination:
The calculated ideal weight range (lower bound to upper bound) is compared against the `currentWeight` input.
If `currentWeight` < Lower Bound: "Underweight"
If `currentWeight` > Upper Bound: "Overweight"
If `currentWeight` is within the range: "Ideal Weight"
Variables Table:
Variable
Meaning
Unit
Typical Range
Age
St. Bernard's age
Months
1 – 24+
Body Condition Score (BCS)
Visual assessment of body fat
Scale 1-4 (or 1-9 in veterinary contexts, simplified here)
1 (Underweight) to 4 (Obese)
Current Weight
St. Bernard's measured weight
lbs (pounds)
10 – 200+
Ideal Weight Range
Calculated healthy weight range
lbs (pounds)
80 – 200+ (depending on age and BCS)
Weight Status
Assessment of current weight vs. ideal
Category
Underweight, Ideal Weight, Overweight
Practical Examples (Real-World Use Cases)
Example 1: Healthy Adult St. Bernard
Scenario: Sarah has a 2-year-old (24 months) female St. Bernard named 'Bear'. Bear is very active, and Sarah can easily feel her ribs with a slight covering of fat. Her waist is visible when viewed from above. Sarah weighs Bear and finds she is 135 lbs.
Inputs:
Dog's Age: 24 months
Body Condition Score (BCS): 2 (Ideal)
Current Weight: 135 lbs
Calculation: Since Bear is an adult (>= 18 months), the base adult range of 120-180 lbs applies. With a BCS of 2 (Ideal), no adjustment is needed. The ideal weight range is 120 lbs to 180 lbs.
Outputs:
Estimated Ideal Weight Range: 120 – 180 lbs
Weight Status: Ideal Weight
Interpretation: Sarah's St. Bernard, Bear, is within the healthy weight range for her breed and condition. This indicates a well-managed diet and exercise plan.
Example 2: Overweight St. Bernard Puppy
Scenario: Mark has a 6-month-old (6 months) male St. Bernard puppy named 'Moose'. Moose is a bit of a foodie and seems to have packed on extra weight. Mark can only feel his ribs with firm pressure, and his waist isn't very defined. He weighs Moose at 90 lbs.
Inputs:
Dog's Age: 6 months
Body Condition Score (BCS): 3 (Overweight)
Current Weight: 90 lbs
Calculation: For a 6-month-old puppy, the calculator estimates a growth curve. Let's assume the base calculation estimates an ideal range of 70-100 lbs at this age. With a BCS of 3 (Overweight), the target range might be adjusted upwards slightly in the calculator's logic (e.g., to 75-105 lbs to show the *ideal* range he *should* be aiming for). However, comparing 90 lbs to the *ideal* range (70-100 lbs), the calculator identifies him as potentially overweight *for his ideal trajectory*. The tool will likely flag him as needing monitoring or a slight dietary adjustment.
Outputs (Illustrative based on calculator logic):
Estimated Ideal Weight Range (for 6mo): 70 – 100 lbs
Current Weight Status: Slightly Above Ideal Range
Recommendation: Monitor diet and activity.
Interpretation: Mark's puppy, Moose, is heavier than typically recommended for his age and needs attention. While not severely obese, his BCS suggests a need for dietary management to prevent long-term health issues associated with excess weight in giant breeds. Mark should consult his veterinarian about a suitable feeding plan.
How to Use This St. Bernard Weight Calculator
Using the St. Bernard weight calculator is straightforward. Follow these steps:
Step 1: Gather Information
Age: Know your St. Bernard's age in months. For puppies, be precise. For adults, you can use '18 months' or older.
Current Weight: Weigh your dog using a reliable scale. If you don't have a large enough scale at home, your veterinarian's office can assist. Ensure the unit is pounds (lbs).
Body Condition Score (BCS): This is a visual and tactile assessment.
Run your hands along your dog's sides. Can you easily feel the ribs?
Look at your dog from above. Is there a visible waistline behind the ribs?
Look at your dog from the side. Is there a noticeable tuck in the abdomen from the chest to the hindquarters?
Choose the description (1-4) that best matches your dog's condition.
Step 2: Input Data
Enter the gathered information into the corresponding fields in the calculator: 'Dog's Age (in months)', 'Body Condition Score (BCS)' (using the dropdown), and 'Current Weight (lbs)'.
Step 3: View Results
The calculator will instantly display:
Estimated Ideal Weight Range: This shows the lower and upper limits of a healthy weight for your St. Bernard based on the inputs.
Weight Status: This categorizes your dog's current weight relative to the ideal range (e.g., "Ideal Weight", "Underweight", "Overweight").
Step 4: Interpret and Act
Compare your dog's current weight to the results. If your dog is within the ideal range, continue with your current feeding and exercise routine. If your dog is underweight or overweight, consult your veterinarian. They can provide personalized advice on diet adjustments, appropriate exercise, and potential underlying health concerns.
Decision-making guidance: Use the results as a starting point for discussions with your vet. The calculator provides an estimate, but professional veterinary assessment is crucial for accurate health management.
Key Factors That Affect St. Bernard Weight Results
While the St. Bernard weight calculator provides a helpful estimate, several factors influence your dog's actual weight and body condition. Understanding these can provide a more holistic view:
Genetics and Build: St. Bernards, like all breeds, have genetic variations. Some individuals naturally have a leaner or stockier build within the breed standard. The calculator provides a general range, but individual genetics play a role.
Age and Life Stage: Puppies have different nutritional and weight needs than adults or seniors. Rapid growth in puppies requires careful monitoring to avoid developmental orthopedic diseases, common in giant breeds. This calculator accounts for age but individual growth spurts can vary.
Activity Level: A highly active St. Bernard will burn more calories than a sedentary one. Dogs with daily walks, playtime, or canine sports will require more food and may maintain a leaner physique compared to less active counterparts, even with the same BCS.
Diet and Nutrition Quality: The type and quality of food fed significantly impact weight. High-quality, appropriately balanced food formulated for large breeds is essential. Overfeeding treats or table scraps can easily lead to weight gain, skewing the BCS assessment.
Spay/Neuter Status: Hormonal changes after spaying or neutering can sometimes slow metabolism, potentially leading to easier weight gain. Owners of altered St. Bernards might need to be more vigilant with portion control and exercise.
Underlying Health Conditions: Certain medical issues, such as hypothyroidism or Cushing's disease, can affect metabolism and weight. Conversely, conditions like malabsorption syndromes can lead to difficulty gaining weight. If your dog's weight seems unexplained, a vet visit is crucial.
Muscle Mass: A very muscular St. Bernard might weigh more than a less muscular dog of the same height and frame. The BCS is designed to account for fat vs. muscle, but extremely athletic dogs can sometimes present a challenge for visual assessment alone.
Frequently Asked Questions (FAQ)
Q1: What is the average weight of an adult St. Bernard?
A: Adult St. Bernards typically weigh between 120 to 180 pounds (approx. 54 to 82 kg). Males are generally heavier than females. However, this is a range, and individual dogs may fall slightly outside it.
Q2: How often should I weigh my St. Bernard?
A: For puppies, it's recommended to weigh them weekly or bi-weekly to track growth. For adults, monthly weighing is a good practice to catch any significant changes early. If your dog is on a weight management plan, follow your vet's specific recommendations.
Q3: My St. Bernard puppy seems too skinny/chubby, what should I do?
A: Use the calculator as a first step, but always consult your veterinarian. Puppies have specific growth needs, and improper weight can lead to serious skeletal issues in giant breeds. Your vet can assess if the deviation is normal or a cause for concern and adjust feeding recommendations.
Q4: How do I accurately assess my dog's Body Condition Score (BCS)?
A: It involves feeling your dog's ribs (should feel like the back of your hand), observing their waist from above (should be visible like an hourglass figure), and checking for an abdominal tuck when viewed from the side. Your vet can demonstrate the proper technique.
Q5: Can this calculator be used for St. Bernard mixes?
A: This calculator is specifically calibrated for purebred St. Bernards. For mixed breeds, it can offer a rough estimate, but it's best to consult breed-specific resources for the other breeds involved and, most importantly, your veterinarian for a personalized assessment.
Q6: What are the risks of my St. Bernard being overweight?
A: Overweight St. Bernards are at higher risk for joint problems (hip dysplasia, elbow dysplasia, arthritis), heart disease, diabetes, respiratory issues, decreased lifespan, and heat intolerance due to their size and predisposition.
Q7: What are the risks of my St. Bernard being underweight?
A: Underweight St. Bernards, especially puppies, may not receive adequate nutrients for proper growth and development, potentially leading to stunted growth, weakened immune systems, and a higher susceptibility to illness.
Q8: Does the calculator account for male vs. female St. Bernards?
A: The calculator uses a general adult weight range (120-180 lbs) which encompasses both sexes, as there's significant overlap. Males tend to be at the higher end, females at the lower. The BCS is the more critical factor for individual assessment, and the calculator adjusts the range based on that.
Related Tools and Internal Resources
Explore these resources for comprehensive pet care and financial planning:
Other Dog Breed Weight Calculators: Find specialized calculators for different dog breeds to ensure accurate health assessments for all your canine companions.
Puppy Growth Tracker Tool: Monitor your puppy's development against breed-specific milestones with our interactive growth tracker.
Pet Food Cost Calculator: Estimate your annual spending on pet food based on your dog's size and dietary needs.
Veterinary Cost Estimator: Get an idea of potential veterinary expenses, including routine care and emergency treatments.
Dog Training Resources Hub: Access guides and tips for training your St. Bernard, focusing on positive reinforcement and breed-specific challenges.
St. Bernard Breed Profile: Learn more about the history, temperament, and care requirements specific to the St. Bernard breed.
function calculateStBernardWeight() {
var ageInput = document.getElementById("dogAge");
var bcsInput = document.getElementById("bodyConditionScore");
var currentWeightInput = document.getElementById("currentWeight");
var ageError = document.getElementById("ageError");
var weightError = document.getElementById("weightError");
var idealWeightDisplay = document.getElementById("idealWeight");
var lowerBoundDisplay = document.getElementById("lowerBound");
var upperBoundDisplay = document.getElementById("upperBound");
var weightStatusDisplay = document.getElementById("weightStatus");
// Reset errors
ageError.textContent = "";
weightError.textContent = "";
var age = parseFloat(ageInput.value);
var bcs = parseInt(bcsInput.value);
var currentWeight = parseFloat(currentWeightInput.value);
var lowerBound = 0;
var upperBound = 0;
var idealWeightText = "–";
var weightStatus = "";
var baseAdultLower = 120;
var baseAdultUpper = 180;
var puppyMonthsThreshold = 18;
// — Input Validation —
if (isNaN(age) || age <= 0) {
ageError.textContent = "Please enter a valid age in months.";
idealWeightDisplay.textContent = "–";
lowerBoundDisplay.textContent = "";
upperBoundDisplay.textContent = "";
weightStatusDisplay.textContent = "";
updateChart([], [], 0, 0);
return;
}
if (isNaN(currentWeight) || currentWeight = puppyMonthsThreshold) { // Adult St. Bernard
var adjustmentFactor = 0;
if (bcs === 1) { // Underweight
adjustmentFactor = -0.10;
} else if (bcs === 3) { // Overweight
adjustmentFactor = 0.10;
} else if (bcs === 4) { // Obese – More aggressive adjustment
adjustmentFactor = 0.20;
} // BCS 2 (Ideal) has 0 adjustment
lowerBound = baseAdultLower * (1 + adjustmentFactor);
upperBound = baseAdultUpper * (1 + adjustmentFactor);
idealWeightText = lowerBound.toFixed(1) + " – " + upperBound.toFixed(1) + " lbs";
} else { // Puppy St. Bernard
// Approximate linear growth from ~20 lbs at 2 months to 120 lbs at 18 months
var initialPuppyWeight = 20;
var initialPuppyAge = 2;
var targetAdultWeight = baseAdultLower; // Aim for lower end of adult range by maturity
var monthsToMature = puppyMonthsThreshold – initialPuppyAge;
var monthlyGain = (targetAdultWeight – initialPuppyWeight) / monthsToMature;
var estimatedWeightAtAge = initialPuppyWeight + (age – initialPuppyAge) * monthlyGain;
// Adjust range based on BCS
var bcsAdjustmentPuppy = 0;
if (bcs === 1) bcsAdjustmentPuppy = -0.15; // More significant for puppies
else if (bcs === 3) bcsAdjustmentPuppy = 0.15;
else if (bcs === 4) bcsAdjustmentPuppy = 0.25;
// Define a healthy range around the estimated weight
var rangePercentage = 0.15; // e.g., +/- 15%
lowerBound = estimatedWeightAtAge * (1 – rangePercentage) * (1 + bcsAdjustmentPuppy);
upperBound = estimatedWeightAtAge * (1 + rangePercentage) * (1 + bcsAdjustmentPuppy);
// Ensure bounds don't go below a reasonable minimum for puppies
if (lowerBound < 10) lowerBound = 10;
if (upperBound < 20) upperBound = 20;
idealWeightText = lowerBound.toFixed(1) + " – " + upperBound.toFixed(1) + " lbs";
}
// Determine Weight Status
if (currentWeight upperBound) {
weightStatusText = "Overweight";
} else {
weightStatusText = "Ideal Weight";
}
// Update Displays
idealWeightDisplay.textContent = idealWeightText;
lowerBoundDisplay.textContent = "Lower Healthy Bound: " + lowerBound.toFixed(1) + " lbs";
upperBoundDisplay.textContent = "Upper Healthy Bound: " + upperBound.toFixed(1) + " lbs";
weightStatusDisplay.textContent = "Current Status: " + weightStatusText;
// Update Chart
updateChart(age, bcs, currentWeight, lowerBound, upperBound);
}
function updateChart(currentAge, currentBCS, currentWeight, lowerBound, upperBound) {
var canvas = document.getElementById('weightChart');
if (!canvas) return;
var ctx = canvas.getContext('2d');
// Clear previous chart
ctx.clearRect(0, 0, canvas.width, canvas.height);
// Chart data generation
var labels = [];
var adultWeightLower = [];
var adultWeightUpper = [];
var puppyGrowth = [];
var puppyLowerBounds = [];
var puppyUpperBounds = [];
var puppyCurrentWeights = []; // For plotting current weight if puppy
// Generate data points up to 24 months and beyond
for (var i = 1; i <= 24; i++) {
labels.push(i + "m");
var bcsForChart = currentBCS; // Use current BCS for simplicity, or could vary
var currentWeightForPoint = currentWeight; // Only use if age matches currentAge
// Puppy calculations
var initialPuppyWeight = 20;
var initialPuppyAge = 2;
var targetAdultWeight = 120;
var puppyMonthsThreshold = 18;
var monthlyGain = (targetAdultWeight – initialPuppyWeight) / (puppyMonthsThreshold – initialPuppyAge);
var estimatedWeightAtAge = initialPuppyWeight + (i – initialPuppyAge) * monthlyGain;
var rangePercentage = 0.15;
var bcsAdjustmentPuppy = 0;
if (bcsForChart === 1) bcsAdjustmentPuppy = -0.15;
else if (bcsForChart === 3) bcsAdjustmentPuppy = 0.15;
else if (bcsForChart === 4) bcsAdjustmentPuppy = 0.25;
var puLower = estimatedWeightAtAge * (1 – rangePercentage) * (1 + bcsAdjustmentPuppy);
var puUpper = estimatedWeightAtAge * (1 + rangePercentage) * (1 + bcsAdjustmentPuppy);
if (puLower < 10) puLower = 10;
if (puUpper < 20) puUpper = 20;
puppyLowerBounds.push(puLower);
puppyUpperBounds.push(puUpper);
puppyGrowth.push(estimatedWeightAtAge); // The average expected weight for this age
if (i === currentAge) {
puppyCurrentWeights.push(currentWeight);
} else {
puppyCurrentWeights.push(null); // Plot nulls where no data exists
}
// Adult calculations after puppy stage
var baseAdultLower = 120;
var baseAdultUpper = 180;
var adultAdjustmentFactor = 0;
if (bcsForChart === 1) adultAdjustmentFactor = -0.10;
else if (bcsForChart === 3) adultAdjustmentFactor = 0.10;
else if (bcsForChart === 4) adultAdjustmentFactor = 0.20;
adultWeightLower.push(baseAdultLower * (1 + adultAdjustmentFactor));
adultWeightUpper.push(baseAdultUpper * (1 + adultAdjustmentFactor));
}
// Combine puppy and adult data for the chart lines
var actualLowerBounds = puppyLowerBounds.slice(0, puppyMonthsThreshold -1 ).concat(adultWeightLower.slice(puppyMonthsThreshold-1));
var actualUpperBounds = puppyUpperBounds.slice(0, puppyMonthsThreshold -1 ).concat(adultWeightUpper.slice(puppyMonthsThreshold-1));
var actualPuppyGrowth = puppyGrowth.slice(0, puppyMonthsThreshold -1);
// Prepare chart datasets
var datasets = [
{
label: 'Healthy Lower Bound',
data: actualLowerBounds,
borderColor: 'rgba(40, 167, 69, 0.8)', // Success green
backgroundColor: 'rgba(40, 167, 69, 0.1)',
fill: false,
tension: 0.1,
borderDash: [5, 5] // Dashed line
},
{
label: 'Healthy Upper Bound',
data: actualUpperBounds,
borderColor: 'rgba(255, 193, 7, 0.8)', // Warning yellow for upper bound
backgroundColor: 'rgba(255, 193, 7, 0.1)',
fill: '-1', // Fills between this dataset and the previous one
tension: 0.1,
borderDash: [5, 5]
}
];
// Add Puppy Growth Line
if (currentAge < puppyMonthsThreshold) {
datasets.push({
label: 'Average Puppy Growth Trajectory',
data: actualPuppyGrowth,
borderColor: 'rgba(0, 74, 153, 0.7)', // Primary blue
backgroundColor: 'rgba(0, 74, 153, 0.1)',
fill: false,
tension: 0.1
});
}
// Add Current Weight point if it's a puppy and entered
if (currentAge 0) {
var currentWeightData = [];
for (var i = 0; i < labels.length; i++) {
if (parseInt(labels[i]) === currentAge) { // Match current age month label
currentWeightData.push(currentWeight);
} else {
currentWeightData.push(null);
}
}
datasets.push({
label: 'Current Weight',
data: currentWeightData,
borderColor: 'rgba(220, 53, 69, 1)', // Red for emphasis
backgroundColor: 'rgba(220, 53, 69, 0.5)',
fill: false,
pointRadius: 6,
pointHoverRadius: 8,
tension: 0
});
}
// Chart configuration
var chartConfig = {
type: 'line',
data: {
labels: labels,
datasets: datasets
},
options: {
responsive: true,
maintainAspectRatio: true,
plugins: {
title: {
display: true,
text: 'St. Bernard Weight Progression',
font: { size: 16 }
},
tooltip: {
mode: 'index',
intersect: false
},
legend: {
display: true,
position: 'top',
}
},
scales: {
x: {
title: { display: true, text: 'Age (Months)' },
beginAtZero: false
},
y: {
title: { display: true, text: 'Weight (lbs)' },
beginAtZero: true,
suggestedMin: 0 // Start y-axis at 0
}
},
hover: {
mode: 'nearest',
intersect: true
}
}
};
// Destroy previous chart instance if it exists
var existingChart = Chart.getChart(canvas);
if (existingChart) {
existingChart.destroy();
}
// Create new chart
new Chart(ctx, chartConfig);
}
function copyResults() {
var mainResult = document.getElementById("idealWeight").innerText;
var lowerBound = document.getElementById("lowerBound").innerText;
var upperBound = document.getElementById("upperBound").innerText;
var weightStatus = document.getElementById("weightStatus").innerText;
var assumptions = "Assumptions: Age=" + document.getElementById("dogAge").value + " months, BCS=" + document.getElementById("bodyConditionScore").options[document.getElementById("bodyConditionScore").selectedIndex].text + ", Current Weight=" + document.getElementById("currentWeight").value + " lbs";
var textToCopy = "St. Bernard Weight Calculator Results:\n\n" +
mainResult + "\n" +
lowerBound + "\n" +
upperBound + "\n" +
weightStatus + "\n\n" +
assumptions;
// Use navigator.clipboard for modern browsers, fallback to textarea
if (navigator.clipboard && navigator.clipboard.writeText) {
navigator.clipboard.writeText(textToCopy).then(function() {
alert("Results copied to clipboard!");
}).catch(function(err) {
console.error("Failed to copy: ", err);
copyToClipboardFallback(textToCopy);
});
} else {
copyToClipboardFallback(textToCopy);
}
}
function copyToClipboardFallback(text) {
var textArea = document.createElement("textarea");
textArea.value = text;
textArea.style.position = "fixed";
textArea.style.left = "-9999px";
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'successful' : 'unsuccessful';
alert('Results ' + msg + 'ly copied to clipboard (fallback method).');
} catch (err) {
alert('Oops, unable to copy (fallback method).');
}
document.body.removeChild(textArea);
}
function resetCalculator() {
document.getElementById("dogAge").value = "18"; // Default to adult start
document.getElementById("bodyConditionScore").value = "2"; // Default to Ideal
document.getElementById("currentWeight").value = "150"; // Sensible adult default
document.getElementById("ageError").textContent = "";
document.getElementById("weightError").textContent = "";
calculateStBernardWeight(); // Recalculate with defaults
}
// Initial calculation on page load
window.onload = function() {
// Set initial values that make sense
document.getElementById("dogAge").value = "18";
document.getElementById("bodyConditionScore").value = "2";
document.getElementById("currentWeight").value = "150";
calculateStBernardWeight();
// Load chart library if not already present (e.g., from another script)
if (typeof Chart === 'undefined') {
var script = document.createElement('script');
script.src = 'https://cdn.jsdelivr.net/npm/chart.js@3.7.0/dist/chart.min.js'; // Use a specific version
script.onload = function() {
// Chart library loaded, now update the chart
var currentAge = parseFloat(document.getElementById("dogAge").value);
var currentBCS = parseInt(document.getElementById("bodyConditionScore").value);
var currentWeight = parseFloat(document.getElementById("currentWeight").value);
var lowerBound = parseFloat(document.getElementById("lowerBound").innerText.split(' ')[3]);
var upperBound = parseFloat(document.getElementById("upperBound").innerText.split(' ')[3]);
updateChart(currentAge, currentBCS, currentWeight, lowerBound, upperBound);
};
document.head.appendChild(script);
} else {
// Chart library already loaded, update directly
var currentAge = parseFloat(document.getElementById("dogAge").value);
var currentBCS = parseInt(document.getElementById("bodyConditionScore").value);
var currentWeight = parseFloat(document.getElementById("currentWeight").value);
var lowerBound = parseFloat(document.getElementById("lowerBound").innerText.split(' ')[3]);
var upperBound = parseFloat(document.getElementById("upperBound").innerText.split(' ')[3]);
updateChart(currentAge, currentBCS, currentWeight, lowerBound, upperBound);
}
};