Fibre Response

This worked like a miracle for my cat for years, but suddenly makes him very sick. I thought we got a bad batch so bought a second bag, but both bags made him vomit and have diarrhea. He’s had three vet visits because of this and no new food works like the past formula, everything else causes constipation. He’s now on prednisone and lactulose daily to try to make a new food work, but it looks like he’s going to need a fourth enema since this formula change.

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!!!

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.

we have been using this for a couple of years and for the most part it has helped our cat but ALWAYS we throw away about a quarter of the bag because it goes bad before it is finished. At $65 a bag I am having a hard time with this. I don't understand why a smaller bag couldn't be made. What cat eats 8.8 lbs of this stuff very quickly at 1/4 cup per serving?

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?

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.

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.

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.

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

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