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

By Hill's Prescription Diet
Rated 4.6 out of 5 stars
Veterinary Diet Item
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Hill's Prescription Diet z/d Skin/Food Sensitivities Original Flavor Dry Dog Food, 25-lb bag slide 1 of 11
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Hill's Prescription Diet z/d Skin/Food Sensitivities Original Flavor Dry Dog Food, 25-lb bag slide 1 of 11

$110.99Chewy Price
$105.44Autoship Price
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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.
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

38 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.

Do I need a perscription from a vet to use this food?
Answer by ChewyNov 04, 2017
This prescription item requires vet approval. Simply provide your vet's information during checkout, and we'll follow up to confirm the prescription.

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.

ReviewsWrite a Review

Rated 4.6 out of 5 stars
860 Reviews
Would recommend to a friend

860 Customer Reviews

Rated 5 out of 5 stars
By Sally on Jun 19, 2022

Diagnosed with IBD

Too early to tell. My dog has been very sick. After a 2 month process Sally was diagnosed with IBD and we are on a food trial plus medicine. This is our 2nd bag, smells great and she seems to like the flavor. Until she is off the medicine we won’t know if the ZD food diet will work for her. Chewy has been helpful and understanding our difficult situation, I wouldn’t shop anywhere else!

Rated 5 out of 5 stars
By MomofJRT7229 on Jun 1, 2022

Bella Loves it!

Our JRT can't survive without it. She can't handle any other food. She will bite her skin to the point of drawing blood creating horrible sores and bald spots. The itching and biting even keeps her up at night when we try any other food. WE RECOMMEND IT VERY HIGHLY FOR DOGS WITH SKIN SENSITIVIES! IT HAD BEEN A LIFE SAVER FOR OUR DOG AND US! I SINCERELY HOPE IT HELPS EVERY DOG THAT TRIES IT!

Rated 4 out of 5 stars
By Ruthie on May 26, 2022

He's doing better!

Scruffy has just started on Hills z/d and seems to be doing better. Gaining weight and feeling peppy. Have ordered and received the larger bag of food and now on automatic order. Since this is a new food for him, not sure when additional food will be needed. How can I change order? Thanks.

Rated 5 out of 5 stars
By Jude on Jun 17, 2022

Gastrointestinal Issues?

This food was prescribed by DVM for my GSD who suffers with itching & gastrointestinal issues. Thanks to Chewy the food is delivered auto-ship so I never run out.

Rated 5 out of 5 stars
By KLPBklyn on Apr 1, 2022

My terrier loves it

My 5-year-old Norfolk Terrier was diagnosed with irritable bowel disease. The vet specialist said he could only eat hydrolyzed dog food. I've been satisfied with other Hill's prescription diets in the past with other dogs, so I chose Hill's z/d. Since he's not allowed treats, I carry the kibble as treats. Other dogs come up to the treat pouch & want some. I've never experienced this much interest. After being on z/d for 2 months, he's back to his happy, healthy self & being weaned off steroids.

Rated 5 out of 5 stars
By Jenn on May 10, 2022


I’ve tried every food under the Sun to help with my girl’s allergies- she is also a senior. This food within a week has changed her completely! Barely itching and her energy and joints are so much better as well! It’s like she’s 5 years younger!

Rated 5 out of 5 stars
By VKatt on Apr 6, 2022

Dog Allergies

The vet started my one dog to this food, due to constant allergies. She was going in almost monthly for allergy shots, Flucanozole, and sometimes antibiotics and steroid pills. We are aware of grass allergies that she has, however, because it is so constant reoccurring we thought we would give it a try. She is now on her 2nd bag, and there is a definite improvement. Definitely would recommend this food.

Rated 5 out of 5 stars
By Juneau on Apr 2, 2022

Juneau loves it

It’s still too early to see if this food aggravates our girl’s skin. But she did well on Derm Complete. However, she never liked it, and then just flat out refused to eat. She went on a hunger strike but would get into other foods as soon as we turned our backs. She loves the taste of this one. It’s so nice to have her happy and anticipating meals again. I’ll check back in when we know if it’s actually working. Fingers crossed.

Rated 3 out of 5 stars
By HAZEL on Jun 9, 2022

Z/D skin/food sensitivities original flavor dry dog food.

It is very early in the process. Just transitioned to this food. My dog really seems to enjoy the food. Hopefully it will help with her skin and food allergies.

Rated 5 out of 5 stars
By Bill on Mar 24, 2022

Prescription Diet for Dogs with food alergies

After dealing with a number of vets for our 9 year old Pitbull I was fortunate to get a reference for a Vet that actual knew of a simply blood test (performed by a Colorado Lab) that would determine our pets allergies. Based on the long list of foods he couldn't eat without bursting out with hives all over his body our Vet gave us a prescription for Hill's Prescription Diet z/d and it's been an absolute game changer, after only a month on the diet his skin condition is almost clear and his energy is back.