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

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25-lb bag
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Food sensitivities and intolerance are potentially serious problems that can result in sensitive or irritated skin, coat and ear conditions or even gastrointestinal upset. Dogs that have a food sensitivities or intolerance, also called adverse reactions to food, typically experience an abnormal response to the protein in the food. If your dog suffers from adverse reaction to food, it is even more important to feed the right food. Hill's nutritionists and veterinarians developed Prescription Diet z/d clinical nutrition especially formulated to support your dog's skin and food sensitivities. In fact, z/d is clinically proven nutrition to help avoid adverse reactions to food.

Key Benefits

  • Helps improve digestion and stool quality with highly hydrolyzed protein
  • Helps eliminate food related causes of skin irritation and results in visible improvement to the skin and coat
  • Helps maintain a healthy skin barrier and enriched with essential fatty acid
  • Developed with a single carbohydrate source: Corn Starch
  • Clinically proven antioxidants are added for optimal health benefits

Special Note

Hill's is going through a packaging and formulation change. Customers may receive the old packaging and formulation during this transition.

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
    25.0 pounds
  • Brand
    Hill's, Science Diet
  • Breed Size
    Small, Medium, Large, All Breeds
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


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

Caloric Content

  1. 354 kcal/cup
Guaranteed Analysis
Crude Protein 14.0% min
Crude Fat 10.0% min
Crude Fiber 5.0% 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: Use only as directed by your veterinarian. 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

Hill's Prescription Diet z/d Original Skin/Food Sensitivities Dry Dog Food is rated 4.7 out of 5 by 292.
Rated 5 out of 5 by from Amazing results it is not hyperbole when I say that Z/D kibble has revitalized my 16 year old poodle! For the last year she has been declining in mental acuity and everyday physical ability- spending the majority of her time sleeping or wandering listlessly. I tried the hills food to give her diet more protein but got a totally different result. A month after being on the food there was a noticeable uptick in her energy level and mental alertness- it has truly transformed her quality of life. She is now frisky, takes long brisk walks without getting tired, and mentally she is so much improved!!! As I haven't changed anything else in her life I really attribute her change to the new food
Date published: 2016-11-23
Rated 5 out of 5 by from z/d has really helped my terrier mix My terrier mix used to have severe allergy problems during her first year of life, which caused unstoppable scratching and skin problems. We were forced to give her steroids shots a few times, which is not good for their overall health. She was constantly taking Benadryl, poor angel. As she grew out of 'puppyhood', the vet suggested we tried changing her diet to z/d to see if her condition would improve. Her condition improved significantly and fairly quickly. She has been on this food for about 3 years now. She still has some environmental allergies, mostly in the spring, but the worse has definitely passed. About a year ago we got a new pup who didn't have the same allergies problems has her, but he refused to eat his regular food and always always preferred hers so... both of them are on this z/d food now.
Date published: 2017-01-07
Rated 5 out of 5 by from Great allergy food! Hill's z/d is the only food our cocker spaniel will eat that helps his food allergies. Before this diet, we were constantly making trips to the vet. Also super fast delivery, thanks chewy!
Date published: 2016-12-29
Rated 5 out of 5 by from Could be a life saver I wish my dog was prescribed on this hydrolyzed protein diet long time ago so myself and my dog should have not suffered for a long time. It's pricey but for as long as it helps my dog with his GI issues and spares us from vet visits, I will continue to work hard so I will be able to afford it. My dog has the Z/D one.
Date published: 2016-12-03
Rated 1 out of 5 by from Stay away What to begin... I have a older English bulldogge that was prescribed this diet which I didn't agree with from the start. The ingredients are just horrible. Well he actually did good on the Hills Science Diet Ultra z/d until we bought the bag that said "New & Improved" because they decided to make numerous changes. So my dog ended up at the vet after continuous scratching and a very large hot spot with mild ear infection and also some hair loss on his face. Well my roommate decided to try the remainder of the bag for her dog. Low and behold he now has a large hot spot (he is not a bulldog and is a mixed breed). The roommate's dog is 6 years old and has never experienced a hot spot and bouts of itching such as this. I'm sorry Science Diet but I also called and complained and the lady seemed careless as to what I was saying. I hope others read this and decide to make better choices!!!
Date published: 2016-08-30
Rated 5 out of 5 by from Hills Z/D Rx diet works for our Goldendoodle's allergies Chewy's price on Hills Prescription Z/D diet for skin allergies is what the vet suggested, and definitely less expensive than purchasing from our vet. We decided to go ahead with the automatic ordering and delivery which shaves a bit more off the price of our 50# bag. This diet is really helping our 60 lb. rescue dog, along with some medication which she takes daily. She's got yeast problems - had smelly, oily coat and constant scratching. Tried some other remedies before asking our vet for allergy help. She's doing great - the only food she gets is Hills Z/D. NOTHING ELSE! No table scraps, treats, zip.
Date published: 2016-12-03
Rated 5 out of 5 by from Helped my Border Collie's IBS My 10 year old Border Collie was in and out of the hospital and ER with severe GI upset. We thought we were going to lose her a couple times. After a bowel biopsy revealed Irritable Bowel Syndrome, my vet recommend the Hills Z/D. I'm all about natural ingredients, so I was skeptical about this, but would do anything for my dogs and was willing to try it. After a week, her symptoms got better and then resolved. Now this is the only food she can eat. NO more diarrhea, vomiting, teeth grinding, or drooling. For her it is a miracle food. We've discovered after trial and error that she can't have fish products (or anything marine related), so this is the only food of its kind on market she is able to stomach. Literally. Glad they have a treat as that is the only treat she can have as well. Glad to have my barn friend back. :-)
Date published: 2016-09-28
Rated 5 out of 5 by from Best for severe allergies This food saved my dog's life. She has horrible allergies and kept getting sick costing me tons of Money. This was the only food she was able to eat and her skin would stay clear. She has red hair and can't have protein plus she's always been itchy and needed benadryl once and a while. I totally recommend this product but it needs to be a strick diet under doctor's care. FYI I have been using chewy.com for over a year and they are top notch!
Date published: 2016-12-10
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