Hill's Science Diet Adult Advanced Fitness Small Bites Dry Dog Food

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38.5-lb bag
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Hill's Science Diet Adult Advanced Fitness Small Bites dog food provides precisely balanced nutrition for a visible difference in dogs who prefer a smaller kibble. 

Key Benefits

  • Exclusive blend of omega-6 fatty acids, vitamin E and other nutrients nourishes the skin and promotes a noticeably shiny coat in 30 days
  • Clinically proven antioxidant blend with vitamins C and vitamins E to help support a healthy immune system
  • Natural, 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
  • Recommended for adult dogs 1-6 years of age

See all items by Hill's Science Diet

  • Item Number
  • Weight
    38.5 pounds
  • Brand
  • Breed Size
    Extra Small, Small
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States

Nutritional Info


  1. Chicken, Whole Grain Wheat, Brewers Rice, Whole Grain Sorghum, Corn Gluten Meal, Whole Grain Corn, Chicken Meal, Chicken Liver Flavor, Pork Fat, Dried Beet Pulp, Soybean Oil, Lactic Acid, Flaxseed, Potassium Chloride, Iodized Salt, Choline Chloride, Calcium Carbonate, Vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (Source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Riboflavin Supplement, Folic Acid, Vitamin D3 Supplement), Minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Taurine, Oat Fiber, Mixed Tocopherols for Freshness, Phosphoric Acid, Beta-Carotene, Natural Flavors, Dried Apples, Dried Broccoli, Dried Carrots, Dried Cranberries, Dried Peas.

Caloric Content

  1. 363 kcal/cup
Guaranteed Analysis
Crude Protein 21.0% min
Crude Fat 12.5% min
Crude Fiber 3.0% max
Vitamin C 85 mg/kg min
Vitamin E 400 IU/kg min
Omega 6 Fatty Acids 2.5% 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! Your pets nutritional needs may change as they age. Ask your vet at every checkup. Science Diet is available in a wide variety of dry foods, wet 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.

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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

Greenies believes in the value of preventative care, so they've assembled a team of world-class scientists, vets and nutritionists to design quality treats that help your pet live a healthier life. Greenies treats make it fun to do what's best for your pet, whether that's maintaining his dental health, administering pills, supporting his joints or improving his skin and coat condition. With an irresistible taste and health benefits, their innovative products allow pet parents to be the hero of treat time!

Shop Hill's Pet Nutrition

About Hill's Pet Nutrition

Customer Reviews

Rated 4.8 out of 5 by 98 reviewers.
Rated 5 out of 5 by Great price/fast shipping My dogs have been on this food for 7 years now and do really well on it. Great ingredients. Chewy provides it at a great price and super fast shipping. September 30, 2016
Rated 5 out of 5 by Why didn't I do this before? First time ordering online. It was so simple, order arrived on time with exactly what I ordered. No going to the store, standing in line, and lugging it home. Love it! October 1, 2016
Rated 5 out of 5 by Great adult dog food I switched my energetic Boston Terrier from her puppy food to this recently. It was an easy transition and keeps her well fed in-between walks and long days at doggie daycare. I highly recommend Hills Science Diet for lifelong feeding- I also use the canned food to make frozen kongs that she loves. September 23, 2016
Rated 5 out of 5 by she's eaten science diet for 8 years now. darcy I have fed my dog Science Diet since I brought her home from the breeders. She is now eight years old and has thrived on it. September 24, 2016
Rated 5 out of 5 by Great Small Bite Food My dog ate Science Diet at the Shelter. They had her on Large Breed Puppy food when we adopted her, but she seemed to have a hard time eating it. I bought this food, since it was determined that she was no longer a puppy - this bag comes in 38.5 lbs which is a very large bag for a small dog. I placed the food in a sealed plastic container to avoid spoilage. My dog no longer has any issues eating. Great product! September 15, 2016
Rated 5 out of 5 by perfect diet for my dog This food is very nutritious and gives my dog lots of energy for her days full of play September 18, 2016
Rated 5 out of 5 by Great product I have 3 Chihuahuas. One 13 years and two twin 16 month old puppies. Been using Hills for a long time. Here's my gripe, the 17 1/2 # bag is hard to open and does not have a zip closer like the adult age defying 15 # has. Why is that? Either this was an old bag, which I doubt, or just poor design by Hills. They need to know. For some reason I can't rotate the picture. September 9, 2016
Rated 5 out of 5 by Our dogs love this product Both of my beagles really like this food and have never tired of it. Hills Science Diet products are recommended by every vet that we have encountered so I don't think rhat you can go wrong with this brand. Enjoy it doggies! September 14, 2016
Rated 5 out of 5 by Love the ease of shopping on line for this great product. Love the larger size. I have 2 Chi mixes and these are the perfect size. September 10, 2016
Rated 5 out of 5 by Best on the market I recently switched my pup to science diet after he had some digestion issues and refused to eat. My family and vet swear by hills. Not only did he start eating again but he was feeling better and looking better. I now swear by hills and will continue to buy their products. September 7, 2016
Rated 5 out of 5 by Too Easy! Ordering large bags of dog food and having them delivered to my door couldn't be any easier (Love the FedEx man even more for the delivery). No more lugging the bags into a cart, then into the car, out of the car and into the house. How could it get any easier? As for savings...I can't say enough. Low prices and no gas used to and from the store. August 29, 2016
Rated 5 out of 5 by Great price Great food, great price. So easy when it comes to your front door. August 31, 2016
Rated 5 out of 5 by loved the service I use Science Diet dog food all the time, it keeps my little white dog from having red stains under his eyes. I could not figure out why he had stains and what to do about it, tried every kind of wash etc. my niece had 2 white dogs that were pretty and white, I noticed they ate Science Diet so I thought I'd give it a try. After about a month, my dogs eyes were pretty and clear too. Great! August 23, 2016
Rated 5 out of 5 by I buy this product for my two dogs all the time My dogs love it, I buy this product always. Have for year August 29, 2016
Rated 5 out of 5 by Dogs loved it!! Our 2- 1 1/2yr old Boxers love it! Perfect size for their mouths. They had no adverse effects from switching from previous dog food to Hills Science product. August 26, 2016
Rated 5 out of 5 by Convenient! Very convenient. Ordered two big bags of dog food. No shipping charges. Less expensive than our local Petsmart. Only negative is my Fedex driver doesn't like it.☹️ August 5, 2016
Rated 5 out of 5 by Perfect supplier Your prices are the best and the delivery is exceptional. I am a life long user of Chewy.com. August 7, 2016
Rated 5 out of 5 by love this product I feed this to my 15 year old dog who has liver problems. He has lots of energy and seems to digest it well. I ordered the chicken and barely which must be completely different or higher in protien than this flavor because he has been vomiting and having diarrhea. I would recommend not changing flavors or types once you start your dog on one. I was think only about flavor, bad idea. July 23, 2016
Rated 5 out of 5 by Saves trips to pet store. Like not having to go get dog food. Price was good and if it remains the same, I will continue to order If shipping is charged I will probably make change. All depends on pricing. July 26, 2016
Rated 5 out of 5 by Great product! I've fed my dogs Science Diet since the dog days. I do recommend it to everybody I talk to. July 24, 2016
Rated 5 out of 5 by great product Have small dogs and they love the little bites. Great prices and fast shipping.. very pleased July 21, 2016
Rated 4 out of 5 by Good Small Dog Food We adopted a Cavalier and this food has been easy for him to chew and digest. I'm happy that this Science Diet dry food has chicken as a first ingredient. Delivery to CT was next day! Would eventually like to go to a grain free product. July 7, 2016
Rated 4 out of 5 by Our go to pet food for cats and Dogs. Science diet cat and dog food are always our pets favorite. They stay healthy and live a long happy life. June 7, 2016
Rated 5 out of 5 by Chewy is the Greatest We feed our two dogs Hills Science Diet which we recently purchased from Chewy. The price was astonishing along with the free delivery since we purchased two 38.5 pound bags. Could not believe when the UPS driver rang our door bell two days later with the food. Best price! Best Service! Chewy is the Best! May 30, 2016
Rated 5 out of 5 by Came quick, my dog loves this food and we saved a lot of money! I ordered the food on a Tues. Evening and it arrived on Thurs. The price was great compared to a pet store or Amazon! Best of all my pup loves this food! June 1, 2016
Rated 4 out of 5 by Good brand of dog food It's a one of good dog food I choose and my dog Mocha love it. June 2, 2016
Rated 5 out of 5 by Fast shipping! Box store price with free shipping,what's not to Like? I'll be buying from Chewy again for my pets needs. May 25, 2016
Rated 5 out of 5 by My two boys love it! We have been feeding our two boys the Hills Small Bites Lite for years. When I ran across the Chewy web site and started looking at this particular blend of ingredients, it sounded better to me. We decided to order it. Our two boys love it, and it has a better smell for them. We will continue with this Hills product now! May 18, 2016
Rated 5 out of 5 by Product is great. My dog loves it. Product arrived on time and the entire process from order to delivery was excellent. May 22, 2016
Rated 5 out of 5 by This product is excellent for small breed dogs. We have been feeding this product to Jasmin since she turned seven. She is now eleven and has had no adverse effects from this product. April 25, 2016
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