1. What is RER and MER?

RER (Resting Energy Requirement) is the number of calories needed for basic physiological functions at rest. MER (Maintenance Energy Requirement) is the total daily energy requirement including activity and other factors.

2. How Does the Calculator Work?

The calculator uses these equations:

Where:

• \( weight_{kg} \) — Body weight in kilograms
• \( factor \) — Life stage multiplier (1.2-2.5)

Explanation: The equation accounts for the non-linear relationship between body weight and metabolic rate.

3. Importance of Calorie Calculation

Details: Accurate calorie estimation is crucial for maintaining healthy weight, preventing obesity, and ensuring proper nutrition for cats at different life stages.

4. Using the Calculator

Tips: Enter weight in kilograms and select the appropriate life stage factor. Weight must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between RER and MER?
A: RER is the base metabolic rate at complete rest, while MER includes activity and other factors.

Q2: How often should I recalculate my cat's calorie needs?
A: Recalculate whenever your cat's weight changes by 10% or more, or when their life stage changes.

Q3: What if my cat is overweight?
A: For weight loss, feed 80% of the MER for ideal body weight. Consult your veterinarian for a specific plan.

Q4: Are there limitations to this calculation?
A: These are estimates. Individual cats may need adjustments based on activity level, health status, and metabolism.

Q5: What factors affect the MER factor?
A: Age, neuter status, activity level, and health conditions all influence the appropriate factor to use.