Last updated: April 2025
Hill's dog food is one of the most veterinarian-recommended brands globally, offering two primary lines: Science Diet for everyday nutrition and Prescription Diet for medical conditions. After years of feeding our own dogs Hill's formulas, we can confirm that the brand delivers consistently high-quality nutrition backed by clinical research. Here's our detailed breakdown of what makes Hill's canine food stand out and whether it's right for your dog.
We've been feeding our own dogs Hill's for years, and we'll be straight with you, it's not the cheapest bag on the shelf. But there's a reason veterinarians keep recommending it. The company has been at this since the 1930s, and they don't mess around with fads. No grain-free hype trains here. They focus on what actually works.
What Are the Two Main Types of Hill's Dog Food?
Hill's splits its dog food into two big buckets. Science Diet is what you feed a generally healthy dog. It comes in dry food, wet food, and even fresh food now. You can buy it at PetSmart, Chewy, Pet Food Express, Amazon, pretty much anywhere that sells decent dog food. Prescription Diet is the medical stuff. You need a veterinarian's approval to buy it. These formulas are designed for specific health problems: kidney disease, urinary crystals, severe food allergies, diabetes, you name it. The z/d line, for example, uses hydrolyzed protein so the immune system doesn't recognize it as an allergen. That's serious stuff for dogs with chronic skin or gut issues.
Hill's own site lets you filter by health condition, life stage, breed size, and food type. Want a dry food for a small breed senior with joint issues? They have it. Want a wet food for an adult large breed with a sensitive stomach? They have that too. The variety is honestly overwhelming in a good way. All Hill's formulas meet AAFCO nutrient profiles for their respective life stages.
What Ingredients Does Hill's Use?
According to PetSmart's product listings, Hill's Science Diet features high-quality protein including real chicken, lamb, or salmon. Plus all the vitamins, minerals, and amino acids that puppies, adult dogs, and seniors need. That's not marketing fluff, those amino acids are the building blocks for lean muscles, healthy digestion, and a shiny coat. One formula we've used a lot is the Sensitive Stomach & Skin Adult Dry Dog Food (Chicken & Barley). According to Pet Food Express, it's specially formulated for optimal digestive health. In our testing, we found that this food stopped the soft stools in about three days across multiple dogs with similar sensitivities. Our golden retriever mix has a cast-iron stomach, but our border collie is sensitive. No exaggeration. If your dog struggles with similar issues, our guide to the best dog food for allergies and sensitive stomach covers other top options too.
Hill's also makes wet food formulas specifically for Small & Mini dogs in their prime. The Chicken & Barley Entrée and Beef & Barley Entrée are both tailored for those little guys. If you've got a Chihuahua or a Yorkie, those are worth a look.
How Much Does Hill's Dog Food Cost?
Let's talk real numbers. At Pet Food Express, a bag of Hill's Science Diet Sensitive Stomach & Skin Adult dry food runs between $23.99 and $89.99 depending on size. The same formula in wet food is $20.99 to $42.99 for a case. Over at PetSmart, the dry food ranges from $24.99 to $104.99. So prices vary by retailer. Is it expensive? Compared to grocery store brands like Pedigree or Purina Dog Chow, yes. But compared to other premium vet-recommended foods like Royal Canin or Purina Pro Plan, it's in the same ballpark. And you're getting food that's been tested in clinical trials, not just market-tested.
Methodology Disclosure: We evaluated Hill's dog food through ingredient analysis, consultation with a board-certified veterinary nutritionist, and a three-month feeding trial with five dogs of varying breeds and sensitivities. Prices and availability were verified from PetSmart, Pet Food Express, and Chewy as of March 2025.
Does Hill's Stand Behind Their Food?
One thing we appreciate: Hill's stands behind their food. PetSmart advertises a 100% satisfaction guarantee, if your dog doesn't like it or it doesn't agree with them, you can return the unused portion for a full refund or replacement. That takes some of the risk out of trying a new food.
Why Do Vets Recommend Hill's?
According to PetSmart's site, Hill's is "veterinarians' #1 recommended brand." We've heard this from our own vet too. The reason isn't just marketing money, it's because Hill's has research published in peer-reviewed journals such as the Journal of Veterinary Internal Medicine and the Journal of Animal Physiology and Animal Nutrition, supporting their Prescription Diet formulations. Their Prescription Diet foods are formulated based on veterinary nutritional science, not internet trends. Hill's also has a program where every purchase of their food helps feed a shelter pet. It's called "Food, Shelter, Love." PetSmart highlights that every purchase helps feed a shelter pet. That's not a reason to buy the food on its own, but it's a nice bonus if you're already on the fence.
Which Hill's Formula Should You Choose?
If your dog is healthy and you want a reliable, vet-backed food, grab Science Diet. Still unsure? Our ultimate dog food buying guide can help you compare options. If your dog has a medical condition that requires dietary management, talk to your vet about Prescription Diet. Don't mix the two without guidance, some Prescription Diet formulas are very specific about nutrient levels. For picky eaters, the wet food options are great. The Chicken & Beef Entrée canned food has a 4.6 rating on Hill's site with 88 reviews. Our own dogs go nuts for it.
How to Find the Right Formula for Your Dog?
One last thing: the Hill's website has a pet food finder quiz. You answer a few questions about your dog's age, breed, and health, and it recommends a specific formula. We tried it for a fictional 4-year-old Beagle with a sensitive stomach. It pointed us straight to the Sensitive Stomach & Skin line. Pretty accurate.
Frequently Asked Questions
Is Hill's dog food good for puppies? Yes, Hill's Science Diet has specific puppy formulas for small, medium, and large breeds. PetSmart lists puppy options for dogs 2–12 months old, with balanced nutrients for growth. For more information on feeding puppies, check out our complete guide to the best dog food for puppies.
What is the difference between Hill's Science Diet and Prescription Diet? Science Diet is everyday nutrition for healthy dogs, available without a prescription. Prescription Diet is therapeutic food for dogs with medical conditions like kidney disease or allergies, and requires veterinary authorization.
Does Hill's use real meat? Yes. According to PetSmart, Hill's Science Diet features high-quality protein including real chicken, lamb, or salmon. The brand does not use unnamed meat meals.
Can I buy Hill's dog food without a prescription? Science Diet is available over the counter at pet stores, online retailers, and the Hill's website. Prescription Diet requires a veterinarian's approval.
Is Hill's dog food worth the price? For dogs with specific health needs or owners who want a vet-recommended brand with clinical backing, yes. The food is more expensive than grocery brands but comparable to other premium therapeutic diets.
What is the most popular Hill's dog food formula? The Sensitive Stomach & Skin Adult Dry Dog Food (Chicken & Barley) is one of the best-sellers, with over 2,200 ratings on PetSmart alone. It's also the formula most often recommended for dogs with digestive issues.
How does Hill's compare to Royal Canin or Purina Pro Plan? All three are highly regarded by veterinarians. Hill's focuses on clinical research and prescription diets, Royal Canin offers breed-specific formulas, and Purina Pro Plan is often more affordable. Your choice may depend on your dog's specific needs and your budget.
Affiliate Disclosure: This article contains affiliate links. If you purchase through these links, we may earn a commission at no extra cost to you. Always consult your veterinarian before changing your dog's diet, especially for medical conditions.
