They might look different, but your dog shares his anatomy with the grey wolf – which They might look different, but your dog shares his anatomy with the grey wolf – which means he’s evolved as a carnivore and adapted for a diet rich in meat, protein, and fat.Based on this biological fact, and to produce a nutritional analysis that mirrors the diet Mother Nature would provide for your dog, ACANA features richly nourishing proteins and fats, while limiting unwanted carbohydrates.