Cats are highly adapted to eat meat. Like all carnivores, they find it more difficult to digest grains. This is highlighted because they don't have the enzyme called amylase in their saliva, which helps to break down these starchy carbohydrates.
Canagan have eliminated all the grain from their recipe to create a food that is high in meat which matches as closely as possible their natural food.
Grains such as corn, wheat and barley have been linked with pet allergies, with symptoms ranging from upset stomach to itchy flaky coat. Even if your pet has no allergies, these grains are significantly less digestible and have limited nutritional value when compared to meat, yet, they are present in the majority of pet foods.