HILL'S PRESCRIPTION DIET z/d Skin/Food Sensitivities Original Flavor Dry Dog Food, 25-lb bag - Chewy.com

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

By Hill's Prescription Diet
Rated 4.4627 out of 5 stars
Veterinary Diet Item

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About This Item


  • Helps improve your dog’s digestion and stool quality with highly hydrolyzed protein.
  • Helps eliminate food-related causes of skin irritation and results in a visible improvement of the skin and coat.
  • Helps maintain a healthy skin barrier and enriched with essential fatty acid.
  • Clinically proven antioxidants are added for optimal health benefits, plus it’s developed with a single carbohydrate source—cornstarch.
  • Skin/Food Sensitivities recipe has not changed—it offers the same great taste and benefits as it did prior to the introduction of the S+OXSHIELD seal of confidence.

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Nutritional Information

Feeding Instructions


Play Video: Learn More About Hill's Prescription Diet From Our Team of Experts
Learn More About Hill's Prescription Diet From Our Team of Experts

About Hill's Prescription Diet Foods for Skin / Food Sensitivities

Improving Lives Together

Groundbreaking Nutrition for Sensitive Dogs

Dogs with skin and coat conditions or food sensitivities can benefit from Hill's Prescription Diet z/d and d/d foods. Prescription Diet d/d has limited ingredient nutrition and a single intact animal protein. The Prescription Diet z/d food features a highly hydrolyzed protein and a single carbohydrate source to minimize the risk of allergic reactions. Many pet parents discover that simply eating the right food helps eliminate food-related causes of skin irritation and helps avoid reactions to food.

Clinical Nutrition

With Hill's, it's not just high-quality ingredients that count. Their focus is on the proper balance of nutrients in every recipe. So Hill's has developed foods that are designed to help pets with specific health conditions, providing the right nutrients to support their health. Hill's alliance with veterinarians puts them in a unique position find a nutrition recommendation for your pet no matter what health issue your pet is facing.

Formulated by Veterinarians

Hill's Prescription Diet started with a veterinarian's belief that some health issues could be managed through nutrition. What began as a theory has now been proven through extensive research by a team of over 220 vets, PhD nutritionists and food scientists. The results can be seen in Hill's Prescription Diet therapeutic pet foods.

Meeting the Highest Standards

Providing a food that delivers exactly what it says it does is Hill's number one priority, in fact, they perform over five million safety and quality checks every year. They've established relationships with trusted suppliers and will only accept ingredients that meet stringent standards.

The Taste Factor

You might know that Hill's Prescription Diet is good for your pet, but she's only concerned with the taste. Even though they place a heavy emphasis on nutrition, Hill's hasn't forgotten about palatability. Savory ingredients are combined to produce foods with enticing aromas, textures, and shapes that your pet can't resist.

Find the Right Formula

Talk to your veterinarian about the right formula for your pet.

z/d Skin/Food Sensitivities


Key Nutrients

  • Highly hydrolyzed animal protein
  • Single purified carbohydrate source
  • High levels of vitamin E
  • Natural fiber
  • Essential fatty acid enriched
  • Clinically proven antioxidants

Health Benefits

  • Visible skin and coat improvement in 30 days
  • Promotes healthy skin barrier
  • Helps support a healthy immune system
  • Clinically proven to help normalize stool

d/d Skin/Food Sensitivities

Potato & Venison

Potato & Duck

Potato & Salmon

Key Nutrients

  • Limited ingredient nutrition with single intact animal protein
  • No soy protein or gluten
  • High levels of omega-3 and 6
  • Clinically proven antioxidants

Health Benefits

  • Results you can see in the skin and coat
  • Helps maintain a healthy skin barrier
  • Helps improve digestion and stool quality
  • Supports a healthy immune system

Derm Defense


Key Nutrients

  • With proprietary complex of bioactives and phytonutrients
  • High levels of omega-3 and 6 fatty acids
  • Clinically proven antioxidants, including vitamin E
  • No corn, chicken or by-product meal, artificial colors, flavors or preservatives

Health Benefits

  • Helps strengthen skin barrier
  • Drives healthy skin from within
  • Formulated to help soothe and nourish skin and coat
  • Helps skin to recover naturally
  • Holistic long-term solution supporting healthy immune system

About Hill's Prescription Diet

Hill's mission is to help enrich and lengthen the special relationships between people and their pet. Their Prescription Diet product line delivers clinically proven nutrition that supports common pet health concerns, from digestive and urinary health to aging and weight management.
Shop Hill's Prescription Diet

Questions & Answers

37 Customer Questions

How many cups is in a 25lb bag?
Answer by ChewyJun 09, 2018
There are approximately 32 cups of kibble in the 8 pound bag, 70 cups of kibble in the 17.6 pound bag, and 100 cups in the 25 pound bag.

Does it help ear yeast infection with growths within the ears in English Springer Spaniels?
Answer by ChewyJun 23, 2018
We would recommend consulting with your veterenarian due to the medical condition, it may require further medical treatment or medicine.

How many calories are in a cup of hill prescription zd dry and wet food?
Answer by ChewyMay 06, 2020
This formula contains approximately 354 calories per cup.

Are any of the ingredients sourced or produced out side of the USA?
Answer by ChewyMar 27, 2021
This food is made in the USA. Hill's sources raw materials only from countries where there are reliable safety procedures in place, primarily in the United States, Japan, Canada, New Zealand, Australia and several European countries.

ReviewsWrite a Review

Rated 4.4627 out of 5 stars
938 Reviews
Would recommend to a friend

938 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 5 out of 5 stars
By WillandGrace on Feb 22, 2023

Great for sensitive stomachs and picky eaters

I have a schnauzer who has difficulty processing proteins. This has been the only food he can digest. His sister has a somewhat sensitive stomach but is a picky eater. I had them both of different diets but when he started to try to eat her food, I had to get them both the same. I was surprised at how well she started to eat when changed.

Rated 1 out of 5 stars
By Jamie on Mar 22, 2023

Not sensitive enough

I had to get a new Rx for this food because the big bag of my dog's normal food (royal canin, ultimino) was out of stock. The Vet told me that it should be ok for his stomach and it us not. He has diarrhea and us vomiting.

Rated 1 out of 5 stars
By GreatDaneMom on Jan 27, 2023

arrived open

Used to be good shipping. Lately it’s taken WEEKS to get my delivery and this time the box and the bag arrived open… and it smells funny- so I’m left having to run out and find the food the second I need it. I contacted customer service and they sent me a return label so I can do a lot of work to return it without any extra details about will I get a replacement? Will I get a refund? Etc etc. I’m not sure what’s going on with distribution but it might be time to take a break and switch to a different service.

Rated 5 out of 5 stars
By DogMom on Jan 11, 2023

Life Saver

This food literally save the life of my six year old, mini golden doodle! He had severe inflammatory bowel due to food allergies. We had no idea that the food he was eating prior to this was literally killing him! Our vet prescribed this food and he is a brand, new dog and full of energy!

Rated 2 out of 5 stars
By Rocky on Jan 9, 2023

Didn't Work Out for Our Pup

Our pup had been on Royal Canin hydrolyzed kibble for almost a year, so to change it up a bit for him (including flavor), we switched him to Hill's Science Z/D since our pup's veterinary told us it was Hill's hydrolyzed version. We gradually introduced the kibble, mixing Royal Canin with Hill's over a period of about 10 days; our pup's stool went from very loose (initially) to soft (towards the end), but it was never solid throughout the 10 day period. We switched back to Royal Canin and his stool was almost back to normal by the 2nd day. I'm sure Hill's Z/D works for a lot of dogs, but if your pup is on Royal Canin and you're planning on making the switch, I would advise against it. In our experience, it was an inferior product.

Rated 2 out of 5 stars
By Mikey01 on Feb 25, 2023

Not Small Bites

First couple days this was okay, now refusing to eat it. I put beef broth on it to soften, nope would not eat. Vet thinks bites are too big. The search continue

Rated 5 out of 5 stars
By Chad on Mar 8, 2023

ZD prescription dog

My dog loves his food. He has lots of allergies and it seems to have helped him out a lot. Some stuff that has prescribed it to him.

Rated 5 out of 5 stars
By Jessica on Feb 7, 2023

Love this!

My 6 yo Min Pin suddenly developed an allergy towards meat proteins, within a month of switching to this brand his awful rash was completely gone!

Rated 5 out of 5 stars
By Kota on Sep 30, 2022

It Worked!

Our Husky rescue struggled with intermittent bloody mucousy diarrhea, we think triggered by spoiled food, for almost two months. We were feeding him a bland diet of fresh cooked meat, rice, and pumpkin but it had no lasting effect. Finally our vet suggested we try the hydrolyzed protein kibble instead of going down the rabbit hole of testing for odd diseases etc. but she warned it may take 4 to 6 weeks to see results. We saw improvements within days as we slowly weaned him off of the fresh food. By two weeks time, we were ready to declare him cured! We worried he would not like the flavor or be able to chew it with his worn down teeth, but unlike the fresh food, he is now a member of the clean plate club and loves it! Hills Z/D to the rescue.

Rated 1 out of 5 stars
By Leyla on Dec 7, 2022

Bad prescribed food

My dog fell ill after eating this prescribed food. She had very loose and extremely stinky poop for 3 weeks so I stopped feeding her with this food. As soon as I changed her diet, she began to improve. I would have never imagined this would happen with such expensive dog food from Hills. It affected her liver. Now she is recovering.