Royal Canin Veterinary Diet Adult Gastrointestinal Fiber Response Dry Cat Food, 8.8-lb bag

By Royal Canin Veterinary Diet
Rated 4.7236 out of 5 stars
Veterinary Diet Item
$72.99Chewy Price
$69.34Autoship Price
(Save an extra 5%)

Why Autoship?

  • Save 5% on all future Autoship orders
  • Set your schedule based on your pet's needs
  • No fees, no commitments - skip, change or cancel anytime.
In Stock
FREE 1-3 day delivery

This item requires vet authorization.

About This Item


  • A veterinary-exclusive dry cat food for cats with long- or short-term digestive sensitivities.
  • Promotes digestive health and optimal stool quality with highly digestible proteins and prebiotics.
  • Formulated to help manage GI health and common gastrointestinal sensitivities.
  • Enriched with a blend of soluble and insoluble fibers for healthy transit through the GI tract.
  • Supports urinary health with the exclusive S/O Index, which creates an environment unfavorable to crystal formation in the bladder.

See More

Nutritional Information

Feeding Instructions


Play Video: Learn More About Royal Canin Veterinary Diet From Our Team of Experts
Learn More About Royal Canin Veterinary Diet From Our Team of Experts

Frequently Bought Together

About Royal Canin Gastrointestinal Health For Cats

Worried About Your Cat’s Digestion?

Your cat’s gastrointestinal (GI) system helps support the rest of the body by properly digesting food and making sure to extract the nutrients needed for overall health. Your veterinarian is the expert on your cat, so you should always consult with this trusted advisor to find the best gastrointestinal health solutions and management options for your pet.

Know Your Cat’s GI System

  1. Mouth: where ingestion of hair and formation of hairballs can occur, due to frequent grooming.
  2. Stomach: the first part of the GI tract, where inflamation may lead to vomitting.
  3. Small Intestine and Pancreas: where the small intestine is responsible for absorption of nutrients within the diet and the pancreas aids in digestion.
  4. Large Colon (Tranverse): which is responsible for forming stool.
  5. Large Colon (Descending): which is responsible for forming stool; any alteration to this process may lead to constipation or diarrhea.
  6. Rectum: where stool leaves the body

How Nutrition Can Help

Talk to your vet about your concerns for your pet's GI tract health. Your veterinarian may recommend a Royal Canin GI formula that is:

Rich in nutrients and easily digestible

Balanced for good digestion, with a blend of fibers and prebiotics to support digestive health

Highly palatable to encourage eating, even when appetite is decreased due to gastrointestinal upset

Find The Perfect Balance

With a dry and wet feeding routine, dry food supports positive oral health while wet food supports healthy hydration.


Keep your pet's feeding on schedule.  Set your order for Autoship to make sure you always have their veterinarian-recommended nutrition on hand.

About Royal Canin

What sets Royal Canin apart is their close collaboration with veterinarians. Through these professional partnerships, they strive to learn everything they can about pet health, including how different formulas perform for different breeds, sizes, lifestyles and therapeutic conditions. Ongoing research and development allows Royal Canin to keep providing the precise nutrition cats need for a range of medical conditions.

Shop Royal Canin

Compare Similar Items

Customer Rating
Rated 4.724 out of 5 stars
Rated 4.5847 out of 5 stars
Rated 4.4543 out of 5 stars
Rated 4.7007 out of 5 stars
Rated 4.5901 out of 5 stars
Price Per Unit
$8.30/lbChewy Price
$7.80/lbChewy Price
$10.68/lbChewy Price
$7.84/lbChewy Price
$7.80/lbChewy Price
$72.99Chewy Price
$59.99Chewy Price
$46.99Chewy Price
$68.99Chewy Price
$59.99Chewy Price
$69.34Chewy Price
$56.99Chewy Price
$44.64Chewy Price
$65.54Chewy Price
$56.99Chewy Price
Top IngredientsBrewers Rice, Chicken By-Product Meal, Corn...Chicken By-Product Meal, Brewers Rice, Corn...New: Chicken By-Product Meal,  Corn,  Brewers Rice...Chicken By-Product Meal, Chicken Fat, Brown Rice...Chicken By-Product Meal, Powdered Cellulose, Tapioca...
Special DietSensitive Digestion, Veterinary Diet, Pea-Free, With GrainVeterinary Diet, Pea-Free, With GrainVeterinary Diet, Pea-Free, With GrainSensitive Digestion, Veterinary Diet, Pea-Free, With GrainVeterinary Diet, Weight Control, Pea-Free, With Grain
Food FlavorPoultry, ChickenPoultry, ChickenPoultry, ChickenPoultry, ChickenPoultry, Chicken
Health FeatureDigestive HealthUrinary Tract HealthCalming, Digestive HealthDigestive Health, High-EnergyWeight Management
Food FormDry FoodDry FoodDry FoodDry FoodDry Food

Questions & Answers

27 Customer Questions

What is the urinary S/O index number or percentage?

Is this food okay for other cats to eat? I have another cat and want to make sure it’s okay for her to eat this food.
Answer by ChewyAug 08, 2018
Since this is a prescription food formulated to meet specific diet restrictions from known health issues, this food should not be fed to any other animal than the one prescribed due to the restriction of specific nutrients. Prescription diets can be detrimental to an otherwise healthy pet if that pet doesn't have the ailment for which the food is designed.

Is this for urinary also?
Answer by ChewyJun 20, 2019
This food is formulated to help cats manage common gastrointestinal sensitivities.

What is chicken by products
Answer by ChewyJun 11, 2021
Chicken by-product meal is made up of chicken that has been ground and cooked, reducing the fat content to create a protein-rich ingredient. It’s high in protein and amino acids to help strengthen and maintain your pet’s muscles. It’s also a high-quality source of glucosamine for joint health.

ReviewsWrite a Review

Rated 4.7236 out of 5 stars
1230 Ratings
Would recommend to a friend

1211 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 4 out of 5 stars
By Nancy on Nov 19, 2023
Top 1000 Contibutor

Smaller size would be appreciated

This food has been helpful for Wilson's constipation issues. However, I will not feed a diet consisting only of dry food therefore By the time we are halfway through the bag Wilson is no longer interested in the food, and it also is not as effective.I relate it to eating a 1/2 bag of pretzels and then they get stale. I have tried putting smaller amounts in a container as to not open the bag as frequently, and that did not work any better. If RC made a 4 or 5 pound bag it would be very helpful. Chewy of course, did an excellent job of shipping quickly as usual.

Rated 5 out of 5 stars
By Jenny on Nov 1, 2023

My cat can finally poop again!

My 19-year-old cat started having extreme constipation, resulting in several visits to the ER vet as well as her normal vet. I switched her to wet food and gave her lactolose periodically, but she still had trouble pooping and started losing weight. Poor baby was miserable. She was on prescription kidney wet food due to early-stage kidney issues, but I asked my vet about other food options, and she suggested this one. I read the reviews and decided to give it a go despite the high price. It's been three weeks, and she's doing GREAT on this food! I mean, big 'ol normal poops every day instead of the rock-hard pebble poops that she used to drop all over the house. I'm so thankful!! (Just be sure you order the correct food. There's another GI food by Royal Canin with almost identical packaging, but it's not the "Fiber Response" food, so just double-check before you order!

Rated 5 out of 5 stars
By Sami on Nov 23, 2023


My older cat was having a ton of digestive issues. Really runny stool and litter box problems (he was pooping in shoes). After switching originally to a similar food he got better, but after then switching to this one he has normal poops and no longer gets sick after using the bathroom. I love this food for my cats so much, although my other younger cats that eat it too have massive human sized poops, which is the only con.

Rated 5 out of 5 stars
By Shane on Oct 15, 2023

Works so well for my picky eater!

I have a neutered male cat that kept getting UTI's and, when stressed, would have bloody stools. He was on the RC S/O prescription diet prior to this but it did not help with his stress and resulting stomach issues. When my vet told me to try this, there was an immediate improvement. He has been on this consistently for 3-4 years now and LOVES it. No UTI's, no more bloody stools even through 2 moves, and he is a healthy weight and looks good. He will not touch any other kibble! I have two other cats that eat regular kibble and he has zero interest in it. This has worked wonders for my cat and I will continue purchasing it. I hope it never changes because the formula works so well.

Rated 1 out of 5 stars
By Katherine on Oct 11, 2023

Did the formula change?

My cat Timmy has struggled with constipation for years. He gets miralax and pumpkin with his wet urinary diet food and that has done wonders for him over the years, but can be difficult to dose correctly. After his PU surgery a few months ago, I was discussing his constipation problems with his surgeon who suggested this food. The first two bags I ordered helped Timmy IMMENSELY. Regular poops, good consistency, etc. Well my most recent bag arrived and I noticed the food looked different. It’s much lighter in color than before. And now Timmy’s constipation is back with a vengeance. We’re on two enemas in as many weeks now. This dry food is really the only variable I can think of in his diet that could be causing this issue. Very disappointed.

Rated 4 out of 5 stars
By Sara on Oct 5, 2023

Works wonders for my cat

My cat needs this fiber response food or he cannot poop and it results in emergency room visits. It is suspected he has IBD based on an ultrasound. I have to mix in about 25% of a regular sensitive stomach formula though or else he gets diarrhea from too much fiber. Also, he’s been on this food for over two years, but now that he’s gotten older and had a couple teeth extracted, he has trouble with the size and shape of this kibble. I have to grind it in the blender and make it into smaller pieces and then sift out the dust. A smaller disc shape like Hill’s offers would be great instead of these larger three-pointed pieces. Also, a smaller bag option like 4 lbs would be nice as well. I only feed this to one cat and I fear that 8.8 lbs goes stale before I can finish the bag, especially in the humid summer months. Overall though, this food has saved my cat’s life. He likes the taste too. He eats it as soon as I put it down.

Rated 5 out of 5 stars
By James on Nov 29, 2023

Fantastic Product

Thanks to this product my cat Tony is feeling great again. It looked like my only alternative to help Tony was colon surgery and I did not want to put him through that. So I am so thankful for this cat food!

Rated 5 out of 5 stars
By Priscilla on Oct 22, 2023

Worth Every Penny!

We have been trying everything for Gitzie's constipation, and nothing worked. Then Dr. Ben recommended Royal Canin Adult Gastrointestinal Fiber Response Dry Cat Food. Dr. Ben mentioned it would be expensive, and it was; but it was worth every penny! (I'm on S.S., so I don't say that lightly). I don't think I've seen Gitz look this good in years!

Rated 3 out of 5 stars
By Sandra on Sep 19, 2023

Changed formula with no warning; my cat almost died!

My cat, Milo, has been stable on this formula for years--except for when RC changed the formula back in 2020. Then Megacolon returned with a vengeance. Six months of enemas and attempts to find something comparable. Finally, they changed the formula back--he was fine. NOW they have changed the formula AGAIN. This time, I had surgery and so didn't see the changed shape of the kibble. Milo almost died, needed intense care, new medication, a completely changed diet (canned I/D food). The "real" formula is triangle-shaped and it works really well. But twice they have changed the kibble to a flat, disc shape, and that doesn't work at all for megacolon. I'm stuck with several bags of expen$ive Rx cat food on top of almost losing Milo. Buyer Beware!

Rated 5 out of 5 stars
By Hamilton on Oct 10, 2023

This stuff has changed our lives!

My poor kitty Monty, who was only three years old when this started, was terribly, PAINFULLY constipated! About every four days his bowel couldn't contain any more, but he was terrified of the litter box because he thought it was causing his pain. The result was him tearing around the house, trying to run from the pain and dropping stool everywhere. Now he's a normal cat who uses his box and enjoys life. I'm eternally grateful!