We said that dogs, like all other animals, need energy which represents the body's ability to produce work.
Such work can consist of inexpensive activities such as rest, digestion, breathing, brain and cardiovascular activity, physical activities and the growth process.
The energy needs vary according to the climate, the place, the type of activity carried out
daily and the individual characteristics of the subject.
Nutrition allows the body to supply simple energy which, through digestion, will be transformed into metabolizable energy.