Hill's Prescription Diet z/d Skin/Food Sensitivities Dog Food 25 lb
- Item Weight: 25 pounds
- Package Size Name: 25 Pound
- Animal Food Diet Type: Veterinary Diet
- Allergen Information: Chicken Meat
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A targeted option for dogs with a vet-confirmed food sensitivity or skin condition, built around hydrolyzed protein rather than novel-protein or grain-free marketing.
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ASIN: B003V5HNHECategory: Veterinary Diets
Overview
Hill's Prescription Diet z/d is a hydrolyzed chicken protein dry dog food formulated for dogs with food sensitivities and skin issues, sold here in a 25 lb bag.
Hydrolyzed protein means the chicken protein is broken into fragments small enough to avoid triggering an allergic or sensitivity response, which is the core mechanism behind Prescription Diet z/d rather than simply being a limited-ingredient food. Hill's lists it under Veterinary Diet, and Amazon's ranking of 4 in Veterinary Diet Dog Food reflects its position within that prescription-style category. As with any Hill's Prescription Diet product, confirm with your vet whether your dog's specific condition calls for this formula.
- Hydrolyzed chicken protein formula
- 25 lb bag size
- Formulated for skin and food sensitivities
- Includes ActivBiome+ digestion support
Who it's for
Fits dogs diagnosed with food sensitivities, allergies, or chronic skin and coat issues where a vet has recommended a hydrolyzed protein diet. Not intended as a general everyday food for dogs without a diagnosed sensitivity.
Pros and cons
- Hydrolyzed protein targets food sensitivities directly
- Formulated for skin and coat issues
- 25 lb bag suits ongoing feeding for larger dogs
- Positioned as a veterinary diet, best used under vet guidance rather than as a general food
- Veterinary-exclusive formulas often cost more than standard dry food
Performance notes
The hydrolyzed chicken protein is processed so the immune system doesn't recognize it as an allergen, which is the mechanism behind the skin and digestive benefits Hill's markets for this line. The included ActivBiome+ digestion component is aimed at supporting gut health alongside the allergy-relief function.
Specifications
| Brand | Hill's |
|---|---|
| Dimensions & fit | |
| Item Weight | 25 poundshigher than 67% of 46 veterinary diets |
| Package Size Name | 25 Pound |
| Dog Breed Size | All |
| Capacity & performance | |
| Age Range Description | Adult |
| Included components | |
| Unit Count | 25 pounds |
| Included Components | Adult-Dog-Food |
| Warranty & support | |
| Warranty Description | 100% Statisfaction, Or Your Money Back |
| Other details | |
| Animal Food Diet Type | Veterinary Diet |
| Allergen Information | Chicken Meat |
| Item Form | Dry Food |
| Flavor | Chicken |
| Special Ingredients | Protein-Rich |
| Breed Recommendation | All Breed Sizes |
| Container Type | Bag |
| Number Of Items | 1 |
| Specific Uses For Product | Allergy Relief, Skin And Coat |
| Target Species | Dog |
| Occasion | Birthday |
| Product Benefits | Promotes digestive health and firm stools |
| Asin | B003V5HNHE |
| Best Sellers Rank | #3,786 In Pet Supplies (See Top 100 In Pet Supplies) #4 In Veterinary Diet Dog Food #274 In Dry Dog Food |
| Manufacturer | Hill's Pet Nutrition |
| Upc | 616174582367 648676233096 052742843902 638932998586 |
| Additional Features | Manages food sensitivities, highly hydrolyzed proteins, ActivBiome+ Digestion |
| Recommended Uses For Product | Skin and Coat, Food Allergies |
| Manufacturer Part Number | 8439 |
| Model Number | 8439 |
| Customer Reviews | {'ratings_count': '1,630', 'stars': '4.7'} |
| Item Type Name | Z/d Skin/Food Sensitivities Dry Dog Food |
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Frequently asked questions
What makes Hill's z/d different from a regular dry dog food?
The chicken protein is hydrolyzed, broken into small fragments meant to avoid triggering food sensitivity reactions.
Does this require a vet's recommendation?
It's part of Hill's Prescription Diet line, so it's intended for dogs with a diagnosed sensitivity or skin condition, best used under veterinary guidance.
What bag size is this?
This listing is the 25 lb bag.