1. What is the Purina MER Equation?

The Purina MER (Maintenance Energy Requirement) equation estimates the daily caloric needs of cats based on their weight and life stage/activity level. It's widely used by veterinarians and pet nutritionists to determine appropriate feeding amounts.

2. How Does the Calculator Work?

The calculator uses the Purina MER equation:

Where:

• \( weight_{kg} \) — Cat's weight in kilograms
• \( factor \) — Adjustment for life stage and activity level

Explanation: The equation accounts for the metabolic rate scaling with body weight (to the 0.75 power) and adjusts for different energy needs based on the cat's physiological state.

3. Importance of MER Calculation

Details: Accurate MER estimation is crucial for maintaining optimal weight, preventing obesity or malnutrition, and supporting special physiological needs like growth, pregnancy, or lactation.

4. Using the Calculator

Tips: Enter the cat's weight in kilograms and select the appropriate factor based on life stage and activity level. For overweight cats, use ideal weight rather than current weight when calculating weight loss diets.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert my cat's weight from pounds to kilograms?
A: Divide the weight in pounds by 2.205. For example, 10 pounds = 10/2.205 ≈ 4.54 kg.

Q2: What if my cat is overweight?
A: Use the cat's ideal weight rather than current weight, and consult with a veterinarian for a weight loss plan.

Q3: How often should I recalculate my cat's MER?
A: Recalculate whenever there are significant changes in weight, life stage, or activity level - typically every 3-6 months.

Q4: Are there limitations to this equation?
A: The equation provides estimates. Individual cats may have higher or lower needs based on metabolism, health status, and environment.

Q5: Should I feed exactly the MER amount?
A: MER is a starting point. Adjust based on body condition score - reduce if gaining weight, increase if losing weight.