1. What is the RER Formula?

The RER (Resting Energy Requirement) formula calculates the daily caloric needs for pets at rest. It's a fundamental calculation used to determine appropriate feeding amounts for Royal Canin and other pet foods.

2. How Does the Calculator Work?

The calculator uses the RER equation:

Where:

• \( RER \) — Resting Energy Requirement (kcal/day)
• \( BW \) — Body Weight in kilograms (kg)

Explanation: The formula uses an exponential relationship between body weight and energy requirements, with 0.75 being the standard metabolic exponent for mammals.

3. Importance of RER Calculation

Details: Accurate RER calculation is crucial for determining proper feeding amounts, maintaining optimal body condition, and preventing obesity or malnutrition in pets.

4. Using the Calculator

Tips: Enter the pet's body weight in kilograms. For accurate results, use the most recent weight measurement from a veterinary scale.

5. Frequently Asked Questions (FAQ)

Q1: What is RER used for?
A: RER provides the baseline caloric needs for a pet at rest, which is then multiplied by factors based on life stage, activity level, and health status to determine daily feeding amounts.

Q2: How does RER differ from MER?
A: MER (Maintenance Energy Requirement) includes activity factors and is typically 1.2-1.8 times the RER, depending on the pet's lifestyle and condition.

Q3: Is this formula suitable for all pets?
A: While the formula works for most dogs and cats, individual variations exist. Always consult with a veterinarian for specific dietary recommendations.

Q4: How often should I recalculate my pet's RER?
A: Recalculate whenever your pet's weight changes significantly (±10%), or every 3-6 months for growing animals and annually for adults.

Q5: Can I use this for puppies/kittens?
A: Yes, but growing animals typically require 2-3 times the RER. Always follow specific feeding guidelines for life stage and consult your veterinarian.