Adequate energy levels to maintain a healthy bodyweight.

A combination of highly digestible proteins, balanced fibers including prebiotics and EPA+DHAhelps to support digestive health.

Specific formulation (including high levels of psyllium) to help maintain a healthy transit.

This diet promotes a urinary environment unfavorable to the development of both struvite andcalcium oxalate crystals.

Working toward a sustainable future

Our belief that pets make our world better inspires and gives life to our purpose of making a better A BETTER WORLD FOR PETS ™

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Labrador Retriever adult sitting with its owner outdoors

Brewers rice, chicken by-product meal, corn, chicken fat, powdered psyllium seed husk, wheat gluten, natural flavors, corn protein meal, dried chicory root, egg product, potassium chloride, vegetable oil, calcium sulfate, fish oil, sodium pyrophosphate, monocalcium phosphate, DL-methionine, choline chloride, fructooligosaccharides, salt, vitamins[DL-alpha tocopherol acetate (source of vitamin E), L-ascorbyl-2-polyphosphate (source of vitamin C), niacin supplement, biotin, riboflavin supplement, D-calcium pantothenate, pyridoxine hydrochloride (vitamin B6), vitamin A acetate, thiamine mononitrate (vitamin B1), vitamin B12 supplement, folic acid, vitamin D3 supplement], marine microalgae oil, taurine, hydrolyzed yeast, trace minerals[zinc proteinate, zinc oxide, manganese proteinate, ferrous sulfate, manganous oxide, copper sulfate, sodium selenite, calcium iodate, copper proteinate], marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3693 kilocalories of metabolizable energy (ME) per kilogram or 362 kilocalories ME per cup on an as fed basis (calculated).

Crude Protein (min)29.0%
Crude Fat (min)13.0%
Crude Fiber (max)4.7%
Moisture (max)7.5%
Eicosapentaenoic + Docosahexaenoic acid (EPA + DHA) (min)0.24%
Potassium (min)0.6%
Sodium (min)0.30%
Vitamin E (min)350 IU/kg
Ascorbic acid* (min)160 mg/kg.

*Not recognized as an essential nutrient by the AAFCO Cat Food Nutrient Profiles.

Weight Overweight Normal
4.4 lb (2 kg) 1/4 cup (26 g) 3/8 cup (33 g)
5.5 lb (2.5 kg) 1/4 cup (30 g) 3/8 cup (38 g)
6.6 lb (3 kg) 3/8 cup (35 g) 3/8 cup (43 g)
7.7 lb (3.5 kg) 3/8 cup (39 g) 1/2 cup (48 g)
8.8 lb (4 kg) 3/8 cup (43 g) 1/2 cup (53 g)
9.9 lb (4.5 kg) 1/2 cup (46 g) 5/8 cup (58 g)
11 lb (5 kg) 1/2 cup (50 g) 5/8 cup (62 g)
12 lb (5.5 kg) 1/2 cup (53 g) 5/8 cup (67 g)
13 lb (6 kg) 5/8 cup (57 g) 3/4 cup (71 g)
14 lb (6.5 kg) 5/8 cup (60 g) 3/4 cup (75 g)
15 lb (7 kg) 5/8 cup (63 g) 3/4 cup (79 g)
17 lb (7.5 kg) 5/8 cup (67 g) 7/8 cup (83 g)
18 lb (8 kg) 3/4 cup (70 g) 7/8 cup (87 g)
19 lb (8.5 kg) 3/4 cup (73 g) 7/8 cup (91 g)

Mixed Feeding

Weight Can + Normal Thin
4.4 lb (2 kg) 1 can + 1/8 cup (16 g) 1/4 cup (29 g)
5.5 lb (2.5 kg) 1 can + 1/4 cup (21 g) 1/4 cup (29 g)
6.6 lb (3 kg) 1 can + 1/4 cup (26 g) 3/8 cup (35 g)
7.7 lb (3.5 kg) 1 can + 3/8 cup (31 g) 3/8 cup (41 g)
8.8 lb (4 kg) 1 can + 3/8 cup (36 g) 1/2 cup (47 g)
9.9 lb (4.5 kg) 1 can + 3/8 cup (41 g) 1/2 cup (52 g)
11 lb (5 kg) 1 can + 1/2 cup (45 g) 5/8 cup (58 g)
12 lb (5.5 kg) 1 can + 1/2 cup (50 g) 5/8 cup (63 g)
13 lb (6 kg) 1 can + 1/2 cup (54 g) 3/4 cup (68 g)
14 lb (6.5 kg) 1 can + 5/8 cup (58 g) 3/4 cup (73 g)
15 lb (7 kg) 1 can + 5/8 cup (62 g) 3/4 cup (78 g)
17 lb (7.5 kg) 1 can + 5/8 cup (66 g) 7/8 cup (83 g)
18 lb (8 kg) 1 can + 3/4 cup (70 g) 7/8 cup (87 g)
19 lb (8.5 kg) 1 can + 3/4 cup (70 g) 7/8 cup (92 g)
Royal Canin Veterinary Diet Feline Gastrointestinal Fiber Response Dry Cat Food

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Customer reviews

AshleyT
13 Mar 2023

Newer formula causes diarrhea

A few years ago I would have given this food 5 stars, but like Isabel100's review from a year ago, something has changed with this food. Going back over a year, we started getting the occasional bag where within 2 days of starting it, my cats would be vomiting regularly and have explosive diarrhea. I'd have that bag exchanged for a new one, and if the new one happened to be an older bag, their issues would clear up immediately. But now all we get are bags that cause the diarrhea. We ended up having to mix it with another gastro food to add some firmness, and the mix worked for awhile...until the most recent bag gave them diarrhea even when mixed with the other food. This is so frustrating as every other food causes constipation - we NEED the old food recipe back!!!
SnowflakesMom
09 Mar 2023

Bring back old formula please!

I agree with all the other owners who say this formula no longer works for their cat. Royal Canin please bring back the old formula of GI Fiber Response. My cat with IBD/possible mega colon almost died after the formula change (vet bills to prove this.) He lost 5 pounds before the vet saw the formula had been changed. He is now on prednisolone daily (never before the change.) I have tried other brands of RX GI dry foods and none have worked. I don't know what to do after my last bag of the old formula run out. Royal Canin bring back the old formula please, I would pay a higher price for the old formula, it would be less expensive than bringing the cat to the vet weekly.
Westchesterite
20 Jan 2023

There is something different about this product

We have been using this product for years and it has really helped our cat. With the last bag, as others have mentioned, something has changed. The quantity and quality of his bowel movements are different (ie, smaller, harder, less frequent). It is very upsetting, because the previous formulation worked perfectly. If this is a new formula, it is awful. Why change something that is working?
Sarah0980980
20 Dec 2022

Latest bag does not work like it previously did

I completely agree with the other reviewer 'AlPal'. My cats have been eating this for years and it helped them have regular poops. As soon as we started the latest bag that they got, the results were not the same at all and they were constipated. I had to double the amount I gave them, which helped in a few days, but that is not sustainable because they are gaining weight! Not sure what to do.
AlPal
08 Nov 2022

The new formula doesn't help

Our cat has been on the gastro dry food for several years. As soon as we put her on it, her poop was amazing. We bought the new formula bag about a month ago, and it does not work anymore. Her poops are once again tiny, hard, and not full. We changed nothing else in her diet, and the problem was almost immediate after the new bag. I have no idea what to do that might be better.
Royal Canin response
I am so sorry to hear that your cat isnt doing well with this new bag. We would like to get this reported, please reach out to our Consumer Care team at 800-592-6687 with the best by and batch details so we may look into this
CJISAHOKIE
11 Sep 2022

Food works, but goes bad quickly

This food works great for my kitty’s tummy issues and we’ve been using it since 2020. However, it seems something changed this year because the food is going bad before we can finish the bag. This is causing considerable issues because she’s getting sick and I’m throwing half the bag away. I wish there was a smaller bag, even more expensive per pound, so that I’m not being wasteful and making my kitty sick.
bills2022
01 Jun 2022

Excellent food

Been using this food for almost a year and my cats have never looked and felt better. Both cats are now regular.
Sureman
31 May 2022

Really helps!

This is the only cat food I have found that helps with my cats digestive issues.
CMTosado
31 May 2022

Excellent food!

My female cat use to suffer from constipation; vet recommended this food & since then she has no issues! It’s been years and she is still healthy!! This food Keeps my cats regular and healthy!
Isabel100
18 Jan 2022

Product is not the same

This product had a makeover within the last year, the new bags now present “fiber response” in a colored strip. However, in the new bags the food has most definitely changed as well. I have compared the two kibble and you can see a color change along with a size change, it’s subtle but def not the same . Obviously this wouldn’t be a problem but what’s not subtle is that both of our cats will barely touch the stuff, and as soon as they are on it for a week or two they both develop yellow diarrhea to the point where one of my cats became incontinent. It’s not a fluke either, our vet still had the old bags in stock while Chewy had the new bag in stock. Month to month from bag to bag it’s the same every time, new bag= diarrhea, no appetite, weight loss old bag= normal stools, hungry and happy kitties. It’s truly a shame because the original formula was truly a life saver for our kitty with severe ibs, now it looks like we are back to the drawing board since it seems they have completely changed to the new bags and most likely new formula.