Weight Loss Calorie Formula:
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This calculator determines the appropriate daily calorie intake for cats needing to lose weight. It's based on the Resting Energy Requirement (RER) formula adjusted for safe weight loss.
The calculator uses the following formulas:
Where:
Explanation: The calculation first determines the cat's basic energy needs at rest, then reduces it by 20% for safe weight loss, with optional adjustments for activity level.
Details: Controlled calorie reduction is essential for safe feline weight loss. Rapid weight loss can cause hepatic lipidosis (fatty liver disease). Aim for 1-2% body weight loss per week.
Tips: Enter current weight and target weight in kilograms. Select activity level. For best results, consult with your veterinarian before starting any weight loss program.
Q1: How fast should my cat lose weight?
A: Healthy weight loss is about 1-2% of body weight per week. Faster loss can be dangerous.
Q2: Should I use this for kittens or pregnant cats?
A: No, this calculator is for adult cats only. Kittens and pregnant/nursing cats have different nutritional needs.
Q3: What if my cat isn't losing weight on these calories?
A: Consult your vet. You may need to adjust further (but never go below RER × 0.7 without veterinary supervision).
Q4: How often should I recalculate?
A: Recalculate every time your cat loses 10% of its body weight to adjust the calorie target.
Q5: What's the best way to measure food?
A: Use a digital kitchen scale for accuracy, as volume measurements (cups) can be inconsistent.