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

By Hill's Prescription Diet
Rated 4.4481 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

Frequently Bought Together

This Item – Hill's Prescription Diet z/d Skin/Food Sensitivities Original Flavor Dry Dog Food, 25-lb bag
Rated 4.4481 out of 5 stars
$123.99Chewy Price

Spend $100, Get a $15 eGift Card

Hill's Prescription Diet Hypo Crunchy Dog Treats, 12-oz bag
Rated 4.5778 out of 5 stars
$12.99Chewy Price

Spend $100, Get a $15 eGift Card

Hill's Prescription Diet z/d Original Skin/Food Sensitivities Canned Dog Food, 13-oz, case of 12
Rated 4.4304 out of 5 stars
$62.99Chewy Price

Spend $100, Get a $15 eGift Card

Total Price: $199.97

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.
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Top IngredientsCorn Starch, Hydrolyzed Chicken Liver, Powdered Cellulose...Whole Grain Wheat, Whole Grain Corn, Chicken Meal...Brown Rice, Brewers Rice, Egg Product...Wheat Flour, Whole Grain Wheat, Chicken Meal...Whole Grain Corn, Brewers Rice, Chicken Meal...
Breed SizeExtra Small Breeds, Small Breeds, Medium Breeds...Extra Small Breeds, Small Breeds, Medium Breeds...Small Breeds, Medium Breeds, Large BreedsExtra Small Breeds, Small Breeds, Medium Breeds...Extra Small Breeds, Small Breeds, Medium Breeds...
Special DietVeterinary Diet, Pea-Free, Hydrolyzed ProteinVeterinary Diet, Weight Control, With GrainVeterinary Diet, With GrainVeterinary Diet, Pea-Free, With GrainVeterinary Diet, Pea-Free, With Grain
Food FlavorPoultry, ChickenPoultry, ChickenPoultry, ChickenPoultry, ChickenPoultry, Chicken
Health FeatureSkin & Coat HealthWeight ManagementDigestive Health, Skin & Coat Health, Allergy ReliefHip & Joint SupportUrinary Tract Health
Food FormDry FoodDry FoodDry FoodDry FoodDry Food

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.

If the z/d is not Gluten Free (It sounds like it has wheat in it?) That defeats the special diet needed for my pup.
Answer by ChewySep 30, 2021
This food contains no gluten, soy protein, lactose, and is not artificially colored, flavored or preserved.

ReviewsWrite a Review

Rated 4.4481 out of 5 stars
993 Ratings
Would recommend to a friend

980 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 Roshni on Nov 18, 2023

My picky dog destroys it!

My dog has always been picky with his food, he is 2 and half and only ate homemade meals his entire life. He never liked dog food, I tried different brands and protein but didn’t work. He has been having some skin irritations lately so our vet recommended him science hill z/d diet to rule out food allergies and he has been destroying his meal every single day. Breakfast and dinner time has been the most exciting time for him lately and we are so happy! I can’t tell if it’s made any difference to his allergies yet cause he just started it but he loves his food!

Rated 4 out of 5 stars
By ONEILL on Oct 26, 2023

Rx from vet - food is fine ...

... but, like so many products post-Pandemic, the package is notably smaller! turns out there's a larger size bag (no one pointed this out before, so maybe that's new) but product is very expensive! Vet recommended for my pooch, so I use it. She loves it ... it's food ... of course she does :)

Rated 3 out of 5 stars
By Brenda on Nov 6, 2023

Quite a bit more than my other source. Ordered from you because they were back ordered and you had $30 off - but this brand didn’t qualify - even though Hills was on picture of the promotion.

Rated 5 out of 5 stars
By allergies on Aug 18, 2023

skin relief for my dog

This has helped with my dogs allergies in a significant way. My 50 lb pit had really bad allergies and once she was put in this food it really helped ease her allergies and it has helped with her sensitivity to certain foods as well. I would highly recommend if your dog has allergies or a sensitive stomach. This food paired with another supplement/medicine is amazing. It’s also good on its own as well. Not only that but the bag has lasted me a lot longer than the previous food I used to buy! So far it’s been over a month and this bag is still going with about half still left over. For the price and the time it lasts me I think it is a really great deal.

Rated 3 out of 5 stars
By Magdalene on Oct 15, 2023

Food sensitivity issues

We’re still in the transitioning from one Food to the other so it’s too early to write the product. The only thing I can say is knock on wood so far she’s handling the change. We’re at 50-50 in the transitioning process.

Rated 5 out of 5 stars
By Grisel on Oct 29, 2023

Delicious food

This is a great option for dogs with allergies problems. When you have to change all his routine, the quality is the best and your dog will be super happy like mine.

Rated 5 out of 5 stars
By Lauren on Aug 12, 2023

Immediate Results

Last year, our 10 year old was having 1-2 days per week with an upset stomach and reduced appetite. After an IBD diagnosis, we started PPP HA. After two months with no improvement, the vet suggested we try a different brand. The results were immediate. Even during the transition from HA to z/d she stopped having any bad days and has not had a problem for the last month and a half. (No hate for PPP HA, every dog has to find the diet that works best for them as an individual.)

Rated 5 out of 5 stars
By Evie on Nov 4, 2023

Great for sensitive stomachs

After 18 months of trying different foods, this is the one our Goldendoodle will eat and TOLERATE for his sensitive stomach.

Rated 5 out of 5 stars
By Nancy on Sep 15, 2023

Both my dogs love it

Even my older picky dog who stopped eating her other prescription dog food will eat this one. I know it is expensive but it stopped my younger dog from itching

Rated 5 out of 5 stars
By Stets on Sep 20, 2023

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

Absolutely wonderful for my dog with skin issues and allergies, noticed a difference a week after starting and he actually wants to eat it!