They typically utilize alternative carbohydrate sources, such as sweet potato, white potato, peas, legumes and so on. Several grain-free dog foods utilize sweet potatoes as a carbohydrate source. Many grain-free diets are formulated with pea protein or legumes as the carbohydrate and fiber source.
Just like their owners, cats need a balanced diet which contains just the right amount of protein, fat, carbohydrates and various vitamins and minerals to ensure they stay in peak condition. Cats require relatively large amounts of taurine in their diet.