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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.
Step 5: Add the values from steps 1 through 4 to determine the logarithm of the normalized incident energy Ein. Step 6: Raise the number 10 to the value found in step 5. This is the incident energy normalized to a working distance of 24 inches and a duration of 0.2 seconds (12 cycles).