1. What is RER and MER?

RER (Resting Energy Requirement) is the number of calories needed for basic bodily functions at rest. MER (Maintenance Energy Requirement) is the total daily calories needed including activity level and life stage factors.

2. How Does the Calculator Work?

The calculator uses these equations:

Where:

• \( weight_{kg} \) — Cat's weight in kilograms
• \( factor \) — Activity multiplier based on life stage

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, supporting growth in kittens, or managing weight loss/gain programs.

4. Using the Calculator

Tips: Enter cat's weight in kg and select appropriate activity factor. Weight must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Why use 0.75 exponent for weight?
A: Metabolic rate scales with body surface area, which follows this non-linear relationship with weight.

Q2: What are typical calorie needs for cats?
A: Most adult cats need 20-30 kcal per pound of body weight daily, but this varies by individual.

Q3: When should I use weight loss factor?
A: When intentionally trying to help an overweight cat lose weight under veterinary supervision.

Q4: Are there limitations to these calculations?
A: Less accurate for very young kittens, extremely obese cats, or cats with certain medical conditions.

Q5: Should I adjust food based on this calculation?
A: Use as starting point but monitor body condition and adjust as needed with veterinary guidance.