[Feeds of vegetable versus those of animal origin (author's transl)]

Dogs can be adequately fed on a vegetable diet. However, specific micronutrients have to be added. The metabolic space within which the cat can adequately operate is restricted because of heavy evolutionary pressure. This has led amongst others to increased dietary protein requirements (unaccompanied, however, by an increase in essential amino acid requirements) and a dietary requirement for certain substances which occur almost only in conjunction with animal proteins and diminished enzyme induction. Regulation of the food intake and the water economy of the body appears to have been also affected.