Hill's prescription diet includes a variety of clinically tested, therapeutic foods for treating a variety of different conditions in cats and dogs. Hill's prescription diet feline y d thyroid care original is a dietetic dry food with reduced iodine levels, which can have a positive effect on the thyroid, and it is also designed to support kidney health in cats. Hill's prescription diet feline y d thyroid care original also has controlled phosphorus and limited sodium levels. You can help to manage your cat’s health by feeding this food exclusively for 3 weeks, which restore and maintain normal thyroxine levels. If you decide to feed this food to your cat, you should try to avoid feeding extra snacks and treats in between meals. The food has great taste that your cat will love. Hill's prescription diet y d thyroid care at a glance dietetic complete food for adult cats specifically developed for cats with hyperthyroidism tailored iodine content to limit iodine uptake from meals supports thyroid health recipe helps to regulate production in the thyroid and lessen the intensity of the symptoms of hyperthyroidism balanced and nutritious with vitamins, minerals, and trace elements as well as beta carotene and natural antioxidants to support vital functions and strengthen the immune system with taurine an essential nutrient for cats to support the heart and vision recommended by vets for an effective, therapeutic diet read more about hill’s brand philosophy and products here. Hill’s brand i science plan i prescription diet i snacks