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RER Equation:
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The Resting Energy Requirement (RER) represents the calories required by a dog at rest in a thermoneutral environment. It's the baseline energy needed for basic physiological functions like breathing, circulation, and cell production.
The calculator uses the RER equation:
Where:
Explanation: The equation accounts for the non-linear relationship between body weight and metabolic rate, with smaller animals having higher metabolic rates per unit of body weight.
Details: RER provides the foundation for calculating a dog's daily caloric needs. It's used to determine maintenance energy requirements (MER) by applying appropriate multipliers based on life stage, activity level, and health status.
Tips: Enter the dog's weight in kilograms. For accurate results, weigh your dog rather than estimating. The weight must be greater than 0.
Q1: How does RER differ from MER?
A: RER is the baseline requirement at rest, while MER (Maintenance Energy Requirement) includes activity factors and is typically 1.2-2.0 times RER depending on the dog's lifestyle.
Q2: Can this be used for puppies?
A: Puppies have higher energy needs. Their MER is typically 2-3 times RER depending on growth stage.
Q3: What about overweight dogs?
A: For weight loss programs, calculate RER based on ideal body weight, not current weight, then multiply by an appropriate factor (usually 0.8-1.0).
Q4: How often should I recalculate my dog's RER?
A: Recalculate whenever your dog's weight changes significantly (more than 10%) or life circumstances change (e.g., altered activity level, health status).
Q5: Can this be used for cats?
A: While the same equation is sometimes used for cats, feline energy requirements can differ. Consult a veterinarian for cat-specific calculations.