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Hill's Prescription Diet z/d Hydrolyzed Chicken Flavor Dry Cat Food, 8.5 lbs.

Hill's Prescription Diet
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Hill's Prescription Diet z/d Hydrolyzed Chicken Flavor Dry Cat Food, 8.5 lbs.

Hill's Prescription Diet
  • star-full
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  • star-full
  • star-full
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(333)
333 Reviews
|Answered Questions
Icon rx food 1Vet Approval Required
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This product requires approval from your pet’s veterinarian.


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Weight: 
4 LBS
8.5 LBS
Free Shipping $35+
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Description

Hill's Prescription Diet z/d Hydrolyzed Dry Cat Food is a highly digestible, great-tasting clinical nutrition formulated to help avoid skin and digestive signs of adverse food reactions in cats. Made without additives known to cause food allergies. Its high digestibility supports easy nutrient absorption and meets the nutritional needs of adult cats. Formulated with Hill's breakthrough ActivBiome+ Digestion a proprietary blend of prebiotic fibers, which is clinically shown to rapidly activate the gut microbiome to support digestive health, improve stool quality and overall well-being. It contains omega-3 and -6 fatty acids. Additionally, it includes clinically proven antioxidants to help support a healthy immune system. Formulated to promote a urinary environment that reduces the risk of developing struvite and calcium oxalate crystals.

  • - Hill's Prescription Diet z/d Hydrolyzed Dry Cat Food is specially formulated by Hill's nutritionists and veterinarians to manage cats' food sensitivities
  • - Nutrition formulated to help reduce scratching, itching, and digestive issues caused by adverse food reactions
  • - Made with highly hydrolyzed proteins that are broken down to avoid detection by the immune system
  • - Promotes healthy skin barrier & helps eliminate food related causes of skin irritation
  • - Continued feeding reduces risk of adverse food reactions & promotes healthy skin and digestion
  • - Rich in Omega-6 & 3 fatty acids to promote skin health and regeneration
  • - Nutrition to improve stool quality & promotes a healthy gut microbiome

Please note that the product information displayed is provided by manufacturers, suppliers and other third parties and is not independently verified by Petco.

Specifications

SKU2195294
LifestageAdult
Primary FlavorChicken
Primary BrandHill's Prescription Diet
Days to ShipShips Within 2-5 Business Days
Weight8.5 LBS
Grain FreeNo
Personalized Item flagYes
Primary FlavorChicken
LifestageAdult
Length5.75 IN
Height12.5 IN
Width9.5 IN
Breed SizesMost Sizes

Brewers Rice, Hydrolyzed Chicken Liver, Rice Protein Concentrate, Soybean Oil, Chicken Liver Flavor, Coconut Oil, Ground Pecan Shells, Calcium Carbonate, Lactic Acid, Potassium Chloride, Fish Oil, Glyceryl Monostearate, Flaxseed, Dried Beet Pulp, Dried Citrus Pulp, L-Lysine, Calcium Sulfate, L-Threonine, Dicalcium Phosphate, Choline Chloride, DL-Methionine, Pressed Cranberries, 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, Cysteine, Iodized Salt, Potassium Citrate, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), L-Tryptophan, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.

Nutrient GA Min, GA Max: Moisture 9.0 %, Protein 29.0 %, Fat 13.5 %, Crude Fiber 4.0 %, Ash 8.4 %, Total Omega-3 FA 0.4 %, Total Omega-6 FA 2.0 %.

100% SATISFACTION GUARANTEED! Hill's is so confident that your pet will enjoy their foods, that they offer a 100% money-back guarantee. If you are unsatisfied for any reason, return the unused portion to the place of purchase for a full refund or replacement.

Please see package for complete 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.

Veterinarian authorized products ship only after Petco receives an authorization from your vet. We will not need to reach out to your vet or you if the authorization includes refills. When all available refills are used or the authorization expires, we will reach out to your vet to obtain a new authorization. For new authorizations, we will attempt to reach your vet for a total of 5 days. If your vet does not respond within 5 days, we will then reach out to you for a total of 3 days. If no response is given, the order will then be canceled.

Default": "These amounts are a starting point only and should be adjusted to maintain proper weight.

Reviews

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5 stars

220

4 stars

51

3 stars

20

2 stars

6

1 stars

36

Overall Rating

4.2
187 out of 333 (56%) reviewers recommend this product

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1 - 8 of 246 Reviews

87 Ratings-Only Reviews

Tasty apparently

JustSomeGal

1 day ago
Overall a good product. Our cat thinks it tastes great, so that's always important. (He started it for diarrhea and it's only slightly improved, but his problem might not just be IBD.) Even the other cats are interested in the food, which is great for a prescription food to be so enticing.

Originally posted on Hill's Pro Staff Feeding

Cat loves it and stays healthy!

Cathy

3 days ago
My kitty has IBD and is well managed on hydrolyzed food and a low dose of steroids. She loves the canned z/d and howls for it every morning.

Originally posted on Hill's Pro Staff Feeding

Cat hates the new formula of z/d kibble, loved the old version

Babycat

11 days ago
My cat has eosinophilic granuloma complex, and part of her management plan is a hypoallergenic diet. She has been eating exclusively Prescription Diet z/d wet and dry food for the past seven years and has loved both. However, she gives a strong thumbs-down to the reformulated dry food, which she has been refusing to eat after we gradually transitioned between the formulas. Fortunately, she will still eat the canned food, but her refusal to eat the kibble has wreaked havoc with her diet plan and has negatively impacted her overall behavior. I wish Hill's would offer the previous formula as an option for those cats who simply will not accept the new formula.

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
10 days ago
Consumer Affairs
Thank you for reaching out to us. We're sorry to hear about your pet’s reluctance to eat our reformulated products. While we strive to create foods which are palatable and acceptable to all pets and pet parents, we recognize that preferences may vary. We will be sure to pass along your feedback to the appropriate departments.

New formula worked for us!

Friyay

1 month ago
I have been feeding my 4 cats this food for 3 years now and I’m very happy with it. Only 3 of them need it for protein allergies and sensitivities but the other really enjoys it as well. I was nervous when they changed the formula since many cat parents were reporting that their cats had an allergic reaction so I stocked up on the old formula. I finally ran out and I was terrified to feed them the new formulation, but to my surprise they didn’t have any allergic reactions. In fact, they like the new formula and I think the new one has helped them in many ways. The fish oil has made their fur very soft and shiny, and the new probiotics has firmed up my girl cat’s stool which she always has been very prone to diarrhea. I was terrified that I would have to find new food for them since the Hydrolyzed foods from Royal Canin, Purina Pro Plan & Blue Buffalo didn’t work for them. It gave them terrible allergies and Hill’s is the only thing that worked for us. I’m so thankful that we got lucky.

Originally posted on Hill's Pet Nutrition

FORMULA CHANGE: added allergens to hypoallergenic diet!!!

Cynth

2 months ago
My cat was on this diet for a year with no problems. In May of 2025, he suddenly began excessively itching and overgrooming. He has been having recurring ear infections since then which has resulted in numerous expensive vet visits with no answers as to why. It wasn't until 6 months later that I thought to check Chewy's most recent reviews for this food, only to find out that the formula had changed in April 2025 and other people's cats were having allergic reactions to it as well. It appears that Hill's added a bunch of allergenic ingredients like waste products from the nut industry under the guise of "prebiotics" without alerting consumers of the change. Since switching his food back to Royal Canin HP, the ear infections and itching have completely ceased. Unfortunately, the pet food industry isn't regulated enough to prevent these unethical practices from happening or holding these massive corporations accountable when they do. I'm leaving this review for others who may be going through the same thing. If your cat is having an allergic reaction to this food, you are not crazy or imagining it!!!

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
2 months ago
Consumer Affairs
Thank you for taking the time to reach out to us with your concern. We are disappointed to hear of your experience and saddened to hear about your cat’s condition. To remain a leader in nutritional health care for companion animals, we continuously research our products and periodically update our formulas to include the latest health benefits and scientific advancements. Over time, this product has undergone 5 other updates—sometimes involving a simple ingredient change, and other times, like now, introducing new innovations such as our ActiveBiome+ formulation. ActiveBiome+ is an advanced blend of prebiotic fibers and antioxidants designed to support healthy digestion, strengthen the immune system, and promote organ health. We appreciate your feedback and will be sure to pass it along to the appropriate department for further review.

Great ingredients.

sprucyelton9

5 months ago
My orange boy has been on this about 3 months and he loves it, seems to be helping with his allergies also.

Originally posted on Hill's Pet Nutrition

Gingerbutter mom

5 months ago
Saved my cat's life. If they won't eat it add a tiny amount of water and mush it up. Not too much water. Then scatter a plate with some. Not a lump. Cats don't eat like dogs. More use of the tongue. Take the time. Product is a game changer. My boy was allover with his t4. 3 tests 3 months to get his meds right and we added this food and although he is going into his 15th year, he is the same sweet ginger as in his youth. Be patient. Start in small bits and best of luck with your fur babies.

Originally posted on Hill's Pet Nutrition

Formula change

Fluffy

5 months ago
I fed the original formula of z/d dry cat food to my cat for 5 years and would give that food 5 stars. She had no digestive issues and was a perfectly healthy cat. In August I received a bag of the new formula without warning and my cat would not eat it. I contacted hills and they gave me a transition bag of the old formula, which took a lot of coaxing/mixing to get her to accept the food. She’s not crazy about it, and will often pull out the pieces of new kibble with her paw and leave it on the floor. She also is drinking a TON of water compared to before. I wish that hills would have left the formula alone it was working so well for many people. This is the only food my cat has been able to eat without getting diarrhea. I just wish she enjoyed it like the old formula and worried she will not eat it once I run out of the old food that is mixed in. Please offer the old formula again! Thanks.

Originally posted on Hill's Pet Nutrition

Response from Hill's Pet Nutrition:
5 months ago
Consumer Affairs
Thank you for taking the time to reach out to us with your concern. To remain a leader in nutritional health care for companion animals, we continuously research our products and periodically update our formulas to include the latest health benefits and scientific advancements. Over time, this product has undergone several updates—sometimes involving a simple ingredient change, and other times, like now, introducing new innovations such as our ActiveBiome+ formulation. ActiveBiome+ is an advanced blend of prebiotic fibers and antioxidants designed to support healthy digestion, strengthen the immune system, and promote organ health. We appreciate your feedback and will pass it along to our quality team for further review.
1 - 8 of 246 Reviews

Questions

1 - 4 of 4 Questions
4 years ago

What is the difference between the d/d formula and z/d? Both say for food sensitivity, but I am having an easier time finding z/d in sock rather then the d/d my vet prescribed. Can I substitute one for the other?

    4 years ago

    Could a 7 month old kitten eat the dry food but still eat wet kitten food?  Our adult cat needs to eat the prescription food but trying to feed them separately is causing neither of them to eat 

    1. 4 years ago
      Yes. Should not be a problem. We do the same with ours



    5 years ago

    Can you feed this to kittens?  

    1. 5 years ago
      Thank you for your question. Prescription Diet® z/d® is formulated to meet the needs of an adult cat. Hill's Pet Nutrition



    5 years ago

    Does the Hills Z/D dry food have more than one flavor?

    1. 5 years ago
      no



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