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, using an appropriate factor.

2. How Does the Calculator Work?

The calculator uses these equations:

Where:

• \( weight_{kg} \) — Animal's weight in kilograms
• \( factor \) — Multiplier based on life stage and activity level

Explanation: The equation accounts for metabolic scaling where smaller animals have higher metabolic rates per unit body weight.

3. Importance of Calorie Calculation

Details: Accurate calorie estimation is crucial for maintaining healthy weight, supporting growth in young animals, or managing weight loss/gain programs.

4. Using the Calculator

Tips: Enter weight in kilograms and select the appropriate activity factor based on your pet's life stage and condition.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between RER and MER?
A: RER is for basic metabolic functions at rest, while MER includes calories needed for activity and other factors.

Q2: How do I convert my pet's weight from pounds to kg?
A: Divide pounds by 2.205 to get kilograms (e.g., 10 lbs = 4.54 kg).

Q3: Which factor should I use for my pet?
A: Use 1.2 for neutered adults, 1.4 for intact adults, 1.6 for weight loss, 2 for weight gain, and 3 for growing puppies/kittens.

Q4: Are there limitations to these equations?
A: These are estimates. Individual needs may vary based on breed, health status, and environment.

Q5: How often should I recalculate my pet's needs?
A: Recalculate whenever your pet's weight changes significantly or their life stage/activity level changes.