Royal Canin Veterinary Diet Gastrointestinal Fiber Response Dry Dog Food

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17.6-lb bag
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  • 17.6-lb bag
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This prescription item requires vet approval. Details



The gastrointestinal tract includes the esophagus, stomach, small intestine, large intestine, and colon. Therefore, gastrointestinal disease is defined as any abnormality involving one or more of these structures. By feeding your pet a diet that contains precise amounts of key nutrients, you can not only help minimize vomiting, diarrhea,or constipation, you can also help to support and improve the function of the gastrointestinal structures. This gastrointestinal diet is formulated to help maintain the balance of gastrointestinal microflora and intestinal mucosal integrity.

Key Benefits

  • Canine Gastrointestinal Fiber Response is a highly digestible, palatable, complete and balanced dry dog food
  • Includes an optimal blend of insoluble and soluble fiber to help regulate intestinal transit.
  • High level of insoluble fiber aids in the management of fiber responsive colitis and diarrhea
  • Contains a combination of highly digestible proteins, prebiotics and EPA & DHA helps support digestive health
  • Developed by nutritionists and veterinarians, this kibble tastes great and nutritionally supports your dog's healthy digestion

Note: Royal Canin Veterinary Diets require a veterinary prescription. This product will not be shipped until a copy of a valid prescription authorization is faxed to 1-800-619-7973 or e-mailed to

See all items by Royal Canin Veterinary Diet

  • Item Number
  • Weight
    17.6 pounds
  • Brand
    Royal Canin
  • Breed Size
    All Breeds, Small Breeds, Medium Breeds, Large Breeds
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Sensitive Digestion, Prescription Food

Nutritional Info


Chicken By-Product Meal, Brewers Rice, Chicken Fat, Powdered Cellulose, Rice Hulls, Corn, Wheat, Corn Gluten Meal, Natural Flavors, Wheat Gluten, Dried Plain Beet Pulp, Fish Oil, Monocalcium Phosphate, Grain Distillers Dried Yeast, Psyllium Seed Husk, Sodium Silico Aluminate, Potassium Chloride, Salt, Calcium Carbonate, Fructooligosaccharides, L-Lysine, Vegetable Oil, Dl-Methionine, Hydrolyzed Yeast, Taurine, Choline Chloride, Vitamins [Dl-Alpha Tocopherol Acetate (Source of Vitamin E), L-Ascorbyl-2-Polyphosphate (Source of Vitamin C), Biotin, D-Calcium Pantothenate, Vitamin A Acetate, Niacin Supplement, Pyridoxine Hydrochloride (Vitamin B6), Thiamine Mononitrate (Vitamin B1), Vitamin B12 Supplement, Riboflavin Supplement, Folic Acid, Vitamin D3 Supplement], Marigold Extract (Tagetes Erecta L.), Trace Minerals [Zinc Proteinate, Zinc Oxide, Ferrous Sulfate, Manganese Proteinate, Manganous Oxide, Copper Sulfate, Calcium Iodate, Sodium Selenite, Copper Proteinate], Rosemary Extract, Preserved with Mixed Tocopherols and Citric Acid.

Caloric Content

3, 334 kcal/kg, 287 kcal/cup

Guaranteed Analysis
Crude Protein 21.0% min
Crude Fat 14.0% min
Crude Fiber 12.5% max
Moisture 10.0% max
Eicosapentaenoic Acid (EPA) 0.18% min
Docosahexaenoic Acid (DHA) 0.08% min

Feeding Instructions

Weight Tendency to become Overweight - Daily Amount (cup) Ideal Weight - Daily Amount (cup)
4.4 lbs 5/8 5/8
11.0 lbs 1 1/8 1 3/8
22.0 lbs 2 2 1/4
33.1 lbs 2 5/8 3
44.1 lbs 3 1/4 3 3/4
55.1 lbs 3 7/8 4 1/2
66.1 lbs 4 1/2 5 1/8
77.2 lbs 5 5 3/4
88.2 lbs 5 1/2 6 3/8
99.2 lbs 6 7
110.2 lbs 6 1/2 7 1/2
132.3 lbs 7 1/2 8 5/8

It is recommended that your dog be feed 2 - 4 equal portions of the diet per day.

Ensure fresh drinking water is available at all times.

Store this product in a cool, dry place.

Transition Instructions

When changing to a new diet, gradually introduce the new food by mixing it with the previous food over a 5 - 7 day period.

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Customer Reviews

113 reviews 113 Reviews 4.9 out of 5 Stars

98% Recommend

98% of reviewersrecommend this product

4.9 / 5
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  • Helped a sick pup!

    By on

    Was recommended by my vet after our 1 year old Boxer fought Giardiasis for several months. Anthelmintics did not work to get rid of the Giardia cysts, so it was recommended to switch to a high-fiber diet as the parasite cannot survive/stick around in this environment. Within a few weeks of transitioning to this food, our pup's stools were back to normal. She also loves the taste of it and basically inhales it at dinner time! Only complaint is that it basically smells the same way in the bag as it does coming out of the dog... But if your dog likes it, I guess that's all that matters!

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  • Excellent...!

    By on

    My doggie always had a real hard time to go to the bathroom, he spent ten or more minutes trying to go but he couldn't, and when he finally did, it was soft with clear slammy sort of mucus that stay hanging out of his bud. The vet prescribed Royal Cannine Gastrointestinal Fiber Response, and it works.....! Now he goes twice a day, and is hard and normal, and he has no problem at all...! He's a happy camper now.

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  • Great Product.

    By on

    I was feeding my dog with Taste of the Wild. Due to digestive issues, my vet recommended changing the food and use this one with probiotics. At least until now it's working great. It has improved the my dog's appetite. He's always eager to eat her two daily dosages. If things changes, I'll come back to write it.

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  • Great product, so easy

    By on

    Our beagle has colitis and our veterinarian told us to put her on a high fiber diet. This food is fairly expensive from the vet and we were looking to find a vendor that would save a few bucks. Chewy charges $13 less for a 17 lb. bag than our vet, so we thought we would order a bag and see how things went. The food was shipped in a box and arrived in great condition. No issues and no worries. We will be ordering from Chewy many more times.

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  • Great for pups with digestive issues!

    By on

    Our vet recommended this to our goldendoodle pup after she struggled to clear a Giardia infection as a puppy. We love this food! It is more expensive than other foods, but has done wonders for her appetite and for her stools (much firmer, more regular). We love Royal Canin as a brand as well!

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  • Great dog food!

    By on

    My dog had stomach issues for six months and was on all kinds of medications to get control of it. After many tests they figured out he had IBS and we tried this food. What a difference! After just one month he was back to normal!

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  • Great for his tummy.

    By on

    This food has done wonders for my Saint Bernard. He has suffered with loose watery stools and this food has cleared that up completely. The only complaint I have is the price. Pretty hefty feeding it to a Saint that eats 8 to 9 cups a day of it.

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  • Great service and products

    By on

    I moved to a new area with my big dog who has a sensitive stomach. He has been on a Vet recommended diet for years. It was wonderful to find that Chewy's carried his food and favorite treats. The convenience of having everything delivered on a regular basis, no matter what the weather is grand!

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  • Great dog food!

    By on

    The fiber response dog food has really helped our new adopted dog. She had inflammation and loose stools that has all cleared! The process for the prescription was very smooth.

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  • Great food for Butch

    By on

    So far Butchie is enjoying this food. It is helping him with his intestinal problems. I like the fact that Chewy delivers their products as quick as they do.

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