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This table is based upon a dog's Resting Energy Requirements or RER. The RER is the basic amount of energy that a dog would use in a day while remaining at rest. The formula to calculate RER for animals between 2 and 45 kg (5 - 99 pounds) is: RER in kcal/day = 30(body weight in kilograms) + 70. Any activity or variable other than rest will require an increase in energy (RER) and an increase in calories to meet the energy needs. Realize that these numbers are not a reflection of maintenance calories but of resting energy levels.
Basal Metabolic Rate (BMR): Most of the body's energy, about 60-70%, goes to supporting the ongoing metabolic work of the body's cells. This includes such activities as heart beat, respiration and maintaining body temperature.To determine your BMR:or adult females-Multiply body weight by 10; add the body weight to this value. [i.e., for a 120 lb female, 1,200 + 120 = 1,320 cal/day BMR]. Energy Expended During Physical Activity: The second component of the equation depends upon your level of physical activity.