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 calories needed including activity level and life stage factors.

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 of body weight.

3. Importance of Calorie Calculation

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

4. Using the Calculator

Tips: Enter weight in kilograms and select the appropriate activity/life stage factor. For accurate results, weigh your pet regularly and adjust food amounts accordingly.

5. Frequently Asked Questions (FAQ)

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

Q2: What if my pet is overweight?
A: Use the weight loss factor (1.2) and aim for gradual weight loss of 1-2% of body weight per week.

Q3: Are there breed-specific considerations?
A: Some breeds may have higher or lower metabolic rates. Consult your veterinarian for breed-specific advice.

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

Q5: Can I use this for very small or very large pets?
A: The equation works for most companion animals, but may be less accurate for pets under 2kg or over 90kg.