The total daily energy needs of an average - sized 7 year old dog may decrease by as much as 20 % when compared with its needs as a young adult. (langleyanimalclinic.ca)
Other factors that determine daily energy needs include activity level, life stage, percent lean body mass, age, and environment. (merckvetmanual.com)
As an adult animal ages, lean body mass declines, resulting in a decrease in total daily energy needs. (langleyanimalclinic.ca)