1. What is RER for Cats?

The RER (Resting Energy Requirement) is the number of calories a cat needs at rest to maintain basic physiological functions. This calculator uses the Purina-recommended formula to estimate daily calorie needs based on weight and activity level.

2. How Does the Calculator Work?

The calculator uses the following formulas:

Then adjusts for activity level:

• Sedentary (Neutered/Indoor): RER × 1.2
• Active (Intact/Outdoor): RER × 1.4
• Weight Loss: RER × 0.8
• Weight Gain: RER × 1.6

3. Importance of Calorie Calculation

Details: Proper calorie calculation helps maintain healthy weight, supports recovery from illness, and prevents obesity-related health issues in cats.

4. Using the Calculator

Tips: Weigh your cat accurately in kilograms. Select the appropriate activity level based on your cat's lifestyle and health goals.

5. Frequently Asked Questions (FAQ)

Q1: How often should I recalculate my cat's calorie needs?
A: Recalculate whenever your cat's weight changes by 10% or more, or if their activity level significantly changes.

Q2: What if my cat is overweight or underweight?
A: Use the weight loss or gain options accordingly, but consult your vet for a personalized plan.

Q3: Are there exceptions to these calculations?
A: Yes, kittens, pregnant/lactating cats, and cats with certain medical conditions need special consideration.

Q4: How accurate is this calculator?
A: It provides a good estimate but individual needs may vary by ±20%. Monitor your cat's weight and adjust as needed.

Q5: Should I feed exactly the calculated amount?
A: Start with the calculated amount but adjust based on your cat's body condition and vet recommendations.