Diets that include high levels of grain such as wheat, sorghum, barley, rice and corn can be higher in carbohydrate and can be hard for cats to digest and to metabolise. High levels of carbohydrates can produce surges in blood sugar, which may lead to hyperactivity and could see your cat becoming overweight. They may also cause stress to the liver and kidneys and could lead to sensitivities or allergies. Encore Complete dry cat food is both high in animal protein and is grain free, to help your cat maintain a healthy weight.