Purina Equation:
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The Purina Dog Food Calculator uses a scientific formula to determine the optimal daily food amount for your dog based on weight and caloric density of the food.
The calculator uses the Purina equation:
Where:
Explanation: The equation accounts for the non-linear relationship between a dog's weight and its metabolic requirements.
Details: Accurate food calculation helps maintain optimal weight, prevents obesity or malnutrition, and ensures your dog gets the right nutrients.
Tips: Enter your dog's weight in kilograms and the caloric density of the food (found on packaging). All values must be positive numbers.
Q1: How do I convert my dog's weight from pounds to kg?
A: Divide pounds by 2.205 to get kilograms (e.g., 20 lbs ÷ 2.205 = 9.07 kg).
Q2: Where do I find the KC value?
A: Check your dog food packaging for kcal/kg or kcal/cup and convert to kcal/gram (divide by 1000 for kcal/kg).
Q3: Is this formula suitable for all dogs?
A: This provides a baseline. Adjustments may be needed for puppies, seniors, or dogs with special conditions.
Q4: How often should I recalculate?
A: Recalculate whenever your dog's weight changes significantly or when switching foods.
Q5: What if my dog is overweight or underweight?
A: Consult your veterinarian for personalized feeding recommendations.