Hill's Prescription Diet y/d Thyroid Care Original Dry Cat Food

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8.5-lb bag
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Hill's Prescription Diet y/d Thyroid Care is the safe, effective and easy way to manage thyroid health. Clinically proven nutrition to restore thyroid health in 3 weeks.

Key Benefits

  • Clinically proven nutrition to restore thyroid health
  • Improves thyroid health in 3 weeks* (when fed as the sole source of nutrition)
  • Complete daily nutrition with a taste your cat will love
  • Supports kidney health with controlled phosphorus and low sodium
  • Helps maintain bladder health with controlled mineral levels
  • Promotes heart health with essential nutrients like taurine and carnitine
  • Promotes healthy skin and a luxurious hair coat with high levels of omega-3 and -6 fatty acids

Special Note

Hill's Prescription Diets require a veterinary prescription. This product will not be shipped until a copy of a valid prescription authorization is faxed to 1-800-619-7973 or e-mailed to rx@chewy.com.

See all items by Hill's Prescription Diet

  • Item Number
  • Weight
    8.5 pounds
  • Brand
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


  1. Corn Gluten Meal, Pork Fat, Whole Grain Corn, Soybean Mill Run, Dried Egg Product, L-Lysine, Chicken Liver Flavor, Potassium Citrate, Lactic Acid, Dicalcium Phosphate, Vitamins (L-Ascorbyl-2-Polyphosphate (Source of Vitamin C), Vitamin E Supplement, Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Riboflavin Supplement, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D3 Supplement), Fish Oil, Choline Chloride, Calcium Carbonate, Calcium Sulfate, Dl-Methionine, Taurine, Vitamin E Supplement, L-Tryptophan, Natural Flavor, Minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Sulfate), L-Carnitine, Mixed Tocopherols for Freshness, Phosphoric Acid, Beta-Carotene, Natural Flavors.

Caloric Content

  1. 517 kcal/cup
Guaranteed Analysis
Crude Protein 30.0% min
Crude Fat 20.0% min
Crude Fiber 3.5% max
Phosphorus 0.45% min
Phosphorus 0.85% max
Sodium 0.3% max
Iodine 0.2% max
Taurine 0.15% min
Carnitine 200 ppm min

Feeding Instructions

Because iodine intake from other food sources -- treats, another cats food, etc. -- can compromise the effectiveness of low-iodine nutrition, its critical that you follow your veterinarians feeding instructions carefully and feed only y/d.Adjust feeding amounts as necessary to maintain optimal weight. If you are unsure, ask your veterinarian. For best results & safety practices: Gradually transition to your pets new food over a 7 day period. Exclusively feed the recommended Prescription Diet dry and/or canned food. Keep fresh water available at all times. Have your veterinarian monitor your pets condition.

Transition Instructions

A gradual transition to a new pet food is important to avoid digestive upset. To transition, mix your pet’s current food with the new food. Over 7 days, gradually decrease the amount of the current pet food while increasing the amount of new pet food. In some cases, your veterinarian may recommend no transition or a shorter transition time.

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Customer Reviews

Rated 4.7 out of 5 by 80 reviewers.
Rated 5 out of 5 by great product keeps my cat healthy. Was desperate to receive product as my vet closed shop unexpectedly and couldnt get yd. Called chewy and in less than 24 hours I had it on my doorstep. I only had 1/2 cup left. Thank you so much for your quick response. October 31, 2016
Rated 2 out of 5 by Cat wouldn't eat it She ate a little of it, first mixed in with her regular dry food. But when I gave her nothing but the Hill's, she ended up not eating at all. It bothers me that I could only purchase a large bag rather than some sample packs or a smaller bag to see if she would eat it. October 16, 2016
Rated 4 out of 5 by It works This works well for my hyperthyroid cat. I originally tried the pill which made him vomit uncontrollably. So I switched to this food. The good: He started to look better within a couple weeks. He doesn't act like he's starving all the time. His fur looks smooth and shiny. His thyroid levels returned to the normal levels. The bad: The ingredients are really bad. It's all corn gluten meal and pork byproducts. I can't give him any other food, treats, etc. I'm concerned about the long-term effects of feeding this food due to the bad ingredients and lack of iodine. If all other options are off the table, try this for your hyperthyroid cat. I don't want to spend the money right now for the radioactive iodine treatment, but that's probably the best and easiest option. August 31, 2016
Rated 5 out of 5 by This dry cat food tastes good, so my cat tells me! My cat would, thankfully, eat this food from day one! According to my veterinarian, the cat will have to eat this food for the rest of her life. I hope the product will really perform well and allow my cat to return to good health. September 28, 2016
Rated 5 out of 5 by Address hyperthyroidism This product addresses our cat's need to avoid foods with iodine content. The hope is to avoid the need for prescription drug maintenance of the problem. September 10, 2016
Rated 5 out of 5 by Awesome Service This product is vital to the well being of my 15 year old kitty, Chuckie, who has gone from 21 lbs. 16lbs. in less than a year. High thyroid, I find, is common in elder cats. I'm 72 yo, and Chuckie is my "baby boy". I bought my first bag at one of the 2 prominent pet stores known nationally and paid $64 incl. tax. Being an avid Googler, I came upon Chewy. I like the design and quickness of the page, and the retail is $10 less, in addition saved another $10 for auto re-order! Here is the kicker... I received this product well packed in an oversized box, LESS than 48 hours after I ordered, and NO handling fee or tax! Highly recommend all you pets that have owners! Plus, their online chat is knowledgeable August 16, 2016
Rated 5 out of 5 by GREAT VALU The cost was less than the vet $10 less than Pet Smart. It was the same price at Petco but because I did not pay tax or shipping it still was a better valu and it came to my home within 4 days of my order! September 15, 2016
Rated 5 out of 5 by Excellent! My cat loves it. Seems to be helping. The Reps at Chewy are wonderful,efficient and responded quickly to my emails. I will definitely use again and recommend. Packaging was perfect was delivered quickly. September 11, 2016
  • 2016-10-31 T07:01:05.548-05:00
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