Hill's Prescription Diet z/d Original Skin/Food Sensitivities Dry Cat Food

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8.5-lb bag
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Food sensitivity and intolerance are potentially serious problems that can result in sensitive or irritated skin, coat and ear conditions or even gastrointestinal upset. Cats that have a food sensitivity or intolerance, also called adverse reactions to food, typically experience an abnormal response to the protein in the food. If your cat suffers from adverse reactions to food, it is even more important to feed the right food. At Hill's, nutritionists and veterinarians have developed clinical nutrition especially formulated to help manage your cat's dietary sensitivity and help reduce the possibility of adverse reactions to food.

Key Benefits

  • Formulated with Hill's Hydrolyzed Protein System, highly digestible proteins that minimize the chances of adverse reactions to food
  • A single, highly digestible carbohydrate source to help avoid adverse reactions to food
  • Highly digestible carbohydrates and fats to help reduce gastrointestinal workload
  • Increased omega 3 and 6 Fatty Acids to help nourish the skin
  • Added antioxidants to help maintain a healthy immune system and skin barrier function

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.

Please note: Hill's is going through a packaging change: Original was formerly Ultra; same great formula, just a new name!

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
    Sensitive Digestion, Prescription Food

Nutritional Info


  1. Brewers Rice, Hydrolyzed Chicken Liver, Soybean Oil, Powdered Cellulose, Chicken Liver Flavor, Lactic Acid, Calcium Carbonate, Calcium Sulfate, Glyceryl Monostearate, Potassium Chloride, DL-Methionine, Choline Chloride, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Riboflavin Supplement, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D3 Supplement), Taurine, Iodized Salt, Dicalcium Phosphate, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.

Caloric Content

  1. 398 kcal/cup
Guaranteed Analysis
Crude Protein 28.0% min
Crude Fat 12.0% min
Crude Fiber 3.5% max
Omega 3 Fatty Acids 0.3% min
Omega 6 Fatty Acids 3.0% min

Feeding Instructions

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 food, canned food & treats. 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 4.5 out of 5 by 92 reviewers.
Rated 5 out of 5 by Both cats love it, & cat w/ with intestinal prob's is better I have two VERY finicky Burmese cats, one of whom has thickened intestinal walls indicating inflammatory bowel disease, which is very serious. It caused him to get increasingly sick, with diarrhea, frequent vomiting, weight loss, and his unhappiness indicated discomfort, too. The most common treatment for the condition is to feed the cat a prescription food such as this which has proteins that are already broken down into smaller bits that don't cause allergic reactions - and that's what Hill's z/d food is. Much to my surprise, my sick cat accepted this food very readily (likes it even better than his old kibble), and my second cat refused her old food in favor of this, so now it's the only food they eat. Too bad it's expensive compared to regular kibble, but it's still cheaper than the vet bills, and the sick cat is so much better! Both cats are at perfect weights, have shiny sleek coats and seem healthy & happy on this food, so I'm a big fan! August 17, 2016
Rated 1 out of 5 by This product was great and then they changed the formula... I have been purchasing this food for almost an entire year after my senior cat was diagnosed with pancriatitis and IBD. He was doing extremely well on this food and then recently Hill's changed the formulation of it. He has been vomiting every couple of days since using the new bag of food with the new formulation. I'm not sure what Hill's changed but I will be purchasing a new brand of food tomorrow. Very disappointed. October 30, 2016
Rated 4 out of 5 by Food has STRONG SMELL, might offend CAT I purchased this dry food because my cat has food allergies. This food did address those issues and the itching stopped within (3) days of starting to only give him this food mixed with Royal Canin "calm". Calm was his original dry food and I thought well maybe I'll try this one since it specifically addresses the food allergies. The Calm was given by my vet for another reason but it helped the scratching/itching. Well, this food does address allergies but it has a SUPER STRONG SCENT. My cat did not like the scent, he ate is the first day, then after that...he would not eat it. I even mixed it with calm and he would eat all the "calm" and leave this food. I would not recommend buying a 8 lb bag, Calm has no smell at all at least not one I can smell. I'm sure the cat smell's something. This food works so don't misunderstand but the smell is very strong. September 12, 2016
Rated 4 out of 5 by recommended by vet my cat has been having allergic reactions with sneezing and nasal congestion that leads to sinus infections and includes a strange build up along his lower mouth lip area. First we stopped all plastic and stainless steel bowls feeders, etc, on vet recommendation. No change. Then vet recommended we use this food because it was probably something in his food. I was feeding expensive Natural Balance food prior. This seems to definitely help. I think he is accepting of this food and my other cat in the house has also changed easily since they eat out of each other's bowls. Thanks to Chewy, I am able to get this food at a much better price then my vet or amazon. October 7, 2016
Rated 5 out of 5 by Senior cat likes it. I adopted a senior abysinnian who had only been fed Purina One kibbles all her life. She was barely eating any of it the first few days I had her and when she did eat, she would barf it up. I took her to the vet to make sure she was healthy and her labs all came back great for an 11 1/2 year old. I had suspected an allergic reaction to something in the food and tried feeding her a grain free kibble, but she didnt take to it. The vet suggested the Hills z/d and gave me a sample. In the past, I was not impressed by Hills or Science Diet, but as long as Phoebe is eating, I am happy. I have added canned food to her diet now as well and she is putting the weight she lost back on and is a happy cat. No more vomiting. !!! September 18, 2016
Rated 4 out of 5 by A good choice for my persian I had to switch my persian to this diet because he was on the Royal Canine hypoallergenic diet earlier but he suddenly decided to stop liking it. I transitioned it in with the old diet and he eventually loved it. I only gave it 4 stars because the shape of the food is not Persian friendly. Persians normally don't chew their food and like to just swallow it so although he likes the taste, he has a hard time keeping it in his mouth. I wish the company would consider making a persian friendly version. The upside is that there is a wet version. Overall, I'm happy with the new diet. **I would also like to point out that I had already purchased a Royal Canine hypoallergenic dry food bag for my cat that I hadn't opened yet. Since my cat stopped eating that one completely, I ordered this diet for him prescribed by his Vet. Customer support at Chewy.com was kind enough to give me a full refund on the old unopened bag. 5 stars on customer service! May 4, 2016
Rated 5 out of 5 by Great product. Keeps your feline in good health. Great company will continue to purchase items. Have been ready and willing to help out in ever occasion. As in if you need prescription. To the company calling the Dr. To get any information to help with the situation. Products come in mail good and the product they show is pretty much what you receive. My friend told me about this site n i recommended to the other people as well. September 19, 2016
Rated 5 out of 5 by Excellent prescription diet for cats I have 2 cats with Pancreatitis that can be difficult to control, but the Z/D food has made such a huge difference! They love the taste and have significantly improved inside and out. My third cat is healthy, but I feed her this diet as well. Even her coat has gotten softer and brighter. Chewy.com has the lowest price too. Remember, the higher quality food less food your cat will eat. I look at it this way, paying a little more for high-quality food is less expensive than multiple vet bills. September 8, 2016
  • 2016-10-31 T07:01:06.174-05:00
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