Hill's Science Diet Adult Grain-Free Dry Dog Food, 21-lb bag

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Healthy choices matter for both pets and parents. That’s why Hill’s has great-tasting, nutritious food to help your dog live a long, happy life. Hill’s Science Diet Adult Grain-Free Dry Dog Food is made with the highest quality natural ingredients for precisely balanced nutrition in dogs with grain sensitivities. Highly digestible protein from fresh chicken helps maintain a healthy heart while natural prebiotics from beet pulp nourish the digestive tract and promote nutrient absorption. Antioxidant-rich apples and cranberries are packed with vitamins E and C to promote healthy immune function while flaxseed provides omega 3 and 6 fatty acids for healthy skin and a radiant coat.

Key Benefits
  • Omega 3 and Omega 6 fatty acids from flaxseed and soybean oil promote a radiant and lustrous coat
  • Clinically proven antioxidant blend with vitamins C and vitamins E to help support a healthy immune system
  • Prebiotic fibers from beet pulp contribute to good digestive health
  • Naturally, high quality, easy-to-digest ingredients with no artificial colors, flavors or preservatives for a flavorful, nutritious meal
  • Highly digestible, high quality protein to help maintain lean muscle and high quality fiber, fatty acids and antioxidants to support healthy digestion, skin and coat and a strong immune system

See all items by Hill's Science Diet

  • Item Number
  • Weight
    21.0 pounds
  • Brand

    Hill's Science Diet

  • Brand

    Hill's, Science Diet

  • Breed Size

    Small Breeds, Medium Breeds, Large Breeds

  • Food Form

    Dry Food

  • Lifestage


  • Made in

    United States

  • Special Diet

    Sensitive Digestion, Grain-Free

Nutritional Info

Chicken, Potatoes, Yellow Peas, Pea Protein, Potato Starch, Chicken Meal, Chicken Fat, Dried Beet Pulp, Chicken Liver Flavor, Flaxseed, Soybean Oil, Lactic Acid, Egg Product, Powdered Cellulose, Pork Fat, Iodized Salt, Potassium Chloride, Choline Chloride, Green Peas, Apples, Cranberries, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Riboflavin Supplement, Biotin, Folic Acid, Vitamin D3 Supplement), Carrots, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Taurine, Broccoli, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.

Caloric Content

392 kcal/cup

Guaranteed Analysis
Crude Protein 21.0% min
Crude Fat 12.0% min
Crude Fiber 4.0% max
Vitamin C 85 mg/kg min
Vitamin E 500 IU/kg min
Omega-3 Fatty Acids 0.5% min
Omega-6 Fatty Acids 3.0% min
Feeding Instructions

Adjust feeding amounts as necessary to maintain optimal weight. If you are unsure, ask your veterinarian. New to this food? Mix increasing amounts of your pets new food with decreasing amounts of the old food over a 7 - day period. Keep fresh water available at all times! Science Diet is available in a wide variety of dry foods, canned foods and treats for your pets unique needs.

Transition Instructions

A gradual transition to a new pet food is important to avoid digestive upset. To transition, mix your pet’s current food with the new food. Over 7 days, gradually decrease the amount of the current pet food while increasing the amount of new pet food.


Precisely Balanced Nutrition for Adult Dogs

Hill's Science Diet adult dog food provides precisely balanced, easy-to-digest nutrition for a visible difference in adult dogs. These yummy recipes are specially formulated for dogs 1-6 years of age to help improve skin and coat health, maintain strong, lean muscles and support immunity.

Precisely Balanced Nutrition for Adult Dogs
Vets' #1 Choice

Vets' #1 Choice to Feed Their Own Pets

More than anyone, veterinarians know a healthy dog food when they see one. That's why they give Hill's Science Diet to their own dogs more than any other brand. Hill's works with pet nutritionists to develop recipes with the best dog food standards in mind. These recipes are designed to keep your furry family member healthy and strong so he can enjoy more moments of overwhelming happiness.

The Science Behind Happy

With over 220 veterinarians, Ph.D. nutritionists and food scientists working every day around the world, Hill's is able to create new products and improve existing ones that help your pet live a long, healthy and full life. They pride themselves on wholesome ingredients, precise nutrition and high-quality standards in pet food because they know firsthand that when your cat is healthier, she's happier too.

The Science Behind Happy
Natural Recipes Made in the USA

Natural Recipes Made in the USA

Hill's is proudly made in the USA with only high-quality protein. Real chicken, lamb or salmon is the first ingredient, along with other natural ingredients sourced from North America, Europe and New Zealand-all free of artificial colors, flavors and preservatives.

Fresh, Whole Food Ingredients

Hill's uses high-quality ingredients to provide the proper balance of essential nutrients for optimal health. Guided by evidence-based research, Hill's formulas are precisely balanced to meet each pet's specific life-stage, size or special needs.



Excellent insoluble fiber source that supports healthy digestion, and the prebiotic fiber stimulates the growth of the favorable gut bacteria (probiotics).



Rich in Omega-3 fatty acids that improve the shine of the pet's coat and high in fiber that helps move food through the digestive system.



Excellent source of B vitamins and vitamin C and contains the most carotene of any vegetable as well as high levels of antioxidants that provide protection against free radicals.



Excellent source of vitamin C and unique natural source of tannins (astringents found in plants) that help prevent harmful bacteria from thriving in the urinary tract.



Good source of antioxidants, vitamin A, vitamin C and dietary fiber, which helps with joint problems and promotes overall gastrointestinal health.



Great source of fiber and vitamin C and boosts the immune system, supports skin and heart health and helps the body release toxins.

About Hill's Pet Nutrition

For more than 70 years, Hill's Pet Nutrition has helped enrich and lengthen the special relationship between people and their pets by putting their passion for balanced pet nutrition into everything they do. With a dedicated team of veterinarians and pet nutritionists involved in the development of all their products, Hill's is able to ensure high-quality pet food to help all pets live a happy and healthy life.

Shop Hill's Pet Nutrition

About Hill's Pet Nutrition
Customer Reviews
33 Reviews 33 Reviews 4.8 out of 5 Stars

100% Recommend

100% of reviewersrecommend this product

4.8 / 5

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  • Dog Loved It

    By on

    My dog loved this food. When she hears it in the bowel she comes running. I am glad she likes this quality product. Thank you Chewy.

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  • Healthy ingredients

    By on

    My cocker and Eski are enjoying HS Grain Free and I believe the ingredients are healthy for them. The main thing is, no matter how healthy, if they won't eat it, it can't do them any good!

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  • Very good dog food

    By on

    Great food, I changed my dog's food because she had allergies so I tried first with skin and stomach formula and the allergies of her skin are gone. So I decided to add to her diet some of the grain free adult formula and she has been great. For a very picky dog she also enjoys the taste of this food. She eats it all each time.

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  • Wonderful!

    By on

    My dogs love it. Grain free and no lentils or peas.

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  • good dog food

    By on

    our sadie likes it the pieces are smaller for easier chopping

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  • Good product good value

    By on

    Took a few days for my dog to get used to smaller bits, but is doing better now.

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  • New Food for my Fur Babies

    By on

    We had to try a new food for our fur babies, as our old one was no longer available. So I did A LOT of checking online and in person to find a great food for our babies. And Hill's Science Diet Grain Free Adult food it is!!! It is sourced in countries with high standards for what is put into the food, made in the USA, is grain free, and highly recommended. The best news is that my babies LOVE IT!!! Based on our experience, I am very happy with this new food for my fur kids. And Chewy.com always makes me happy with their choices and unparalleled value and service.

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  • Good stuff my boxer loves it.

    By on

    I've noticed he started to gain a little weight so going to have to talk to vet about portion control

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  • They Love It !!!

    By on

    Switched over from Blue Buffalo after their last recall. My girls love it!!!

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