The dog has evolved as a carnivore, with a natural need for a diet of varied fresh meat and fish supplemented with small amounts of vegetables, fruits and grasses. Acana Heritage is made largely from nutrients naturally present in the ingredients; synthetic additives are kept to a minimum. Older dogs may benefit from protein-rich foods to support muscles. Acana Senior Dog consists of 65% fresh meat and fresh fish; free-range chicken and wild-caught flatfish. Also, this food is low in carbohydrates and therefore low in energy. This can help with obesity. Acana Hertitage Senior Dog is suitable for all dogs aged seven years and older.