Acana Singles are made with one source of protein supplemented with a small amount of vegetables, fruits and herbs. In addition, the Singles consist mostly of nutrients naturally present in the ingredients; synthetic additives are kept to a minimum. Grass-fed Lamb Dog by Acana contains lamb and sun-ripened fruits and vegetables from Canada's Okanagan Valley that contribute to healthy digestion. This combination of ingredients also makes Grass-fed Lamb suitable as an elimination diet.