1. What is the MER Equation?

The Maintenance Energy Requirement (MER) equation estimates a dog's daily calorie needs based on weight and activity level. It accounts for metabolic scaling where larger animals need relatively fewer calories per kilogram than smaller animals.

2. How Does the Calculator Work?

The calculator uses the MER equation:

Where:

• \( W \) — Body weight in kilograms (kg)
• \( F \) — Activity factor (dimensionless)

Explanation: The equation uses metabolic body weight (W^0.75) which better represents energy needs than simple body weight. The activity factor adjusts for different life stages and activity levels.

3. Importance of Calorie Calculation

Details: Accurate calorie estimation helps prevent obesity (most common nutritional disorder in dogs) or underfeeding. Proper calorie intake supports growth, maintenance, and performance.

4. Using the Calculator

Tips: Weigh your dog accurately (vet scales are most precise). Choose the appropriate activity factor based on your dog's life stage and exercise level.

5. Frequently Asked Questions (FAQ)

Q1: Why use W^0.75 instead of simple weight?
A: Metabolic rate scales with body surface area, not directly with weight. The 0.75 exponent accounts for this relationship seen across species.

Q2: How often should I recalculate my dog's needs?
A: Recalculate after any significant weight change (≥10%), life stage change, or activity level change.

Q3: What if my dog needs to gain or lose weight?
A: For weight loss, feed 80% of MER. For weight gain, feed 120% of MER. Adjust based on progress.

Q4: Are there limitations to this equation?
A: Less accurate for very small (<2kg) or giant breed dogs. Does not account for medical conditions affecting metabolism.

Q5: How should I divide these calories between meals?
A: Adult dogs typically do well with 2 meals/day. Puppies may need 3-4 meals. Adjust based on your dog's preferences and digestion.