1. What is MER and RER?

RER (Resting Energy Requirement) is the calories needed for basic bodily functions at rest. MER (Maintenance Energy Requirement) is the total daily calories needed including activity, calculated as RER multiplied by a life stage/activity factor.

2. How Does the Calculator Work?

The calculator uses these equations:

Where factor depends on life stage:

• 1.6 — Adult neutered (typical pet)
• 1.8 — Adult intact
• 2.0 — Working/active dogs
• 3.0 — Puppies (0-4 months)
• 2.5 — Puppies (4-12 months)
• 1.2 — Weight loss program

3. Importance of Proper Nutrition

Details: Proper calorie calculation helps prevent obesity (most common nutritional disorder in pets) while ensuring adequate nutrition for growth, activity and health maintenance.

4. Using the Calculator

Tips: Weigh your pet accurately. Select appropriate life stage factor. For weight loss, use 1.2 factor and consult your veterinarian for a complete plan.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculator for cats or dogs?
A: The basic equation works for both, but factors may differ. For cats, typical adult factor is 1.2-1.4.

Q2: How often should I recalculate?
A: Recalculate after any significant weight change (5% or more), life stage change, or activity level change.

Q3: What if my pet is overweight?
A: Use the weight loss factor (1.2) and aim for 1-2% body weight loss per week. Always consult your vet.

Q4: Are there exceptions to these calculations?
A: Yes, some medical conditions require special diets. Always consult your veterinarian for pets with health issues.

Q5: How do I convert this to food portions?
A: Check your pet food's kcal/cup or kcal/can and divide MER by this number. Adjust based on body condition.