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 cats 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 Suppor