Acana Heritage Adult Small Breed Dogs have evolved as carnivores, with a biological need for a diet that contains a variety of fresh meat and fish combined with a small amount of vegetables, fruits and grass. Acana Heritage mostly contains nutrients that occur naturally in the ingredients; synthetic additives are reduced to a minimum. Acana Heritage Adult Small Breed Dog consists of 60% protein-rich ingredients: free-range chicken, free-range eggs and wild-caught flounder.