Calorie Calculation Formulas:
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RER (Resting Energy Requirement) is the number of calories needed for basic physiological functions at rest. MER (Maintenance Energy Requirement) is the total daily calories needed including activity and other factors.
The calculator uses these equations:
Where:
Explanation: The equation accounts for metabolic scaling where smaller animals have higher metabolic rates per unit of body weight.
Details: Accurate calorie estimation is crucial for maintaining optimal weight, supporting growth, pregnancy/lactation, and working dogs' performance.
Tips: Enter weight in kg and select appropriate activity/life stage factor. For lactating dogs, use factor 4 for first month, up to 8 for large litters.
Q1: How often should I recalculate my dog's needs?
A: Recalculate whenever weight changes by 10% or more, or if activity level/life stage changes significantly.
Q2: What if my dog is overweight?
A: Use current weight but aim for MER based on ideal weight, reducing gradually (10-20% below calculated MER).
Q3: Are there breed differences?
A: Some breeds may have slightly different metabolic rates, but this equation works well for most dogs.
Q4: What about senior dogs?
A: Generally use 1.2 factor but monitor body condition as some seniors may need less due to decreased activity.
Q5: How accurate is this for very large or small dogs?
A: Works well across sizes, but giant breeds may need slightly less and tiny breeds slightly more than calculated.