HILL'S PRESCRIPTION DIET z/d Hydrolyzed Dry Dog Food — Hypoallergenic for Adult Dogs, Skin & Digestive Support

Hill's Prescription Diet z/d Hydrolyzed Dry Dog Food is a veterinary-formulated, hypoallergenic dry diet designed to minimize adverse food reactions and support skin and digestive health in adult dogs.

When a dog reacts to ingredients in standard diets, owners and vets often turn to a controlled, highly digestible formula to pinpoint triggers and reduce symptoms. Hill's z/d uses hydrolyzed proteins and a targeted fiber blend to make nutrients easy to absorb while limiting components that commonly provoke food sensitivities. It also includes omega fatty acids and antioxidants to support skin condition and immune resilience, and its nutrient profile is balanced for long-term feeding under veterinary guidance.

How does z/d help a dog with suspected food allergies?

z/d relies on proteins that have been broken into very small building blocks (hydrolyzed), making them less likely to be recognized by the immune system as allergens. By simplifying the ingredient profile, the diet reduces exposure to common reactive components while still delivering complete nutrition for adult dogs.

• Hydrolyzed proteins reduce immune recognition of food antigens.
• Made without additives commonly linked to food allergies.
• Formulated to meet adult dogs' nutritional requirements.

What digestive benefits can I expect and how quickly?

z/d is formulated for high digestibility and includes ActivBiome+ prebiotic fibers that help activate the gut microbiome. Clinical data provided by the brand shows measurable improvement in stool consistency in a matter of days, while ongoing use supports nutrient uptake and digestive stability.

• ActivBiome+ helps stimulate beneficial gut bacteria activity.
• Clinically shown to firm loose stool within three days in studies.
• Designed for efficient nutrient absorption to reduce gastrointestinal stress.

Will z/d help my dog's skin and coat?

The formula contains omega-3 and omega-6 fatty acids plus clinically supported antioxidants that help support skin condition and a healthy coat. While individual responses vary, owners frequently observe visible improvements when the diet is fed consistently.

• Balanced omega-3 and -6 fatty acids for skin health and regeneration.
• Antioxidants support immune health which can influence skin condition.
• Visible skin and coat improvements are commonly reported within weeks.

Are there urinary or long‑term feeding considerations?

z/d is balanced to support a urinary environment that helps lower the risk of developing certain crystal types. It was created by Hill's nutritionists and veterinarians for potential long-term use under veterinary supervision, so discuss extended feeding plans with your veterinarian to ensure suitability.

• Formulated to reduce risk of struvite and calcium oxalate crystal formation.
• Developed by veterinary nutrition experts for clinical feeding plans.
• Made in the USA with trusted global ingredients and quality controls.

Who is this for? Hill's Prescription Diet z/d is intended for adult dogs diagnosed with or suspected of having adverse food reactions, dogs needing a controlled hydrolyzed protein diet, or pets whose veterinarians recommend a therapeutic nutrition plan to manage skin and digestive signs. Always consult your veterinarian before starting or transitioning to prescription therapeutic diets to confirm it's the right choice for your dog and to plan monitoring and duration of feeding.

Ingredients

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