Energy Requirement
The energy requirement for adult cats range from 60–70 kcal metabolizable energy/kg body weight per day for inactive cats to 80–90 kcal/kg BW for active cats. Kittens at five weeks of age require 250 kcal/kg BW. The requirement drops with age, to 100 kcal/kg BW at 30 weeks and to the adult requirement at about 50 weeks. Gestating cats require about 90–100 kcal/kg BW and lactating cats 90–270 kcal/kg BW depending on litter size.
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—Orson Welles (1915–1984)
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