Home
Back
Purina Weight Loss Formula:
Where RER (Resting Energy Requirement) is calculated as:
\[ RER = 70 \times (weight\ in\ kg)^{0.75} \]
| From: | To: |
The Purina Weight Loss Formula calculates the appropriate caloric intake for dogs needing to lose weight by using 80% of the Resting Energy Requirement (RER). This approach provides a safe and effective caloric restriction for gradual, healthy weight loss.
The calculator uses two key formulas:
Where:
Explanation: The formula accounts for metabolic scaling with body size, providing a more accurate estimate than simple weight-based calculations.
Details: Proper caloric restriction is crucial for safe, effective canine weight loss. Too rapid weight loss can cause health issues, while insufficient restriction won't achieve results. The 80% RER approach balances these concerns.
Tips: Enter your dog's current weight in kilograms. For best results, weigh your dog regularly and adjust food intake as weight changes. Always consult with your veterinarian before starting a weight loss program.
Q1: Why use 80% of RER for weight loss?
A: This provides a moderate caloric restriction that promotes steady weight loss (1-2% of body weight per week) while maintaining health and minimizing muscle loss.
Q2: How do I convert my dog's weight from pounds to kilograms?
A: Divide pounds by 2.205 to get kilograms. For example, 20 lbs ÷ 2.205 = 9.07 kg.
Q3: Should I adjust for activity level?
A: This calculation is for resting needs. Very active dogs may need slightly more, but weight loss diets typically maintain the restriction and adjust exercise instead.
Q4: How often should I recalculate?
A: Recalculate every time your dog loses 10% of body weight, or at least monthly during weight loss.
Q5: What if my dog isn't losing weight on this amount?
A: Consult your vet. Some dogs may need further restriction (down to 70% RER), but this should only be done under veterinary supervision.