My cats Alani & Blaze also have very sensitive tummies. I prefer to feed my cats grain free but the Wellness Core was just too rich for their sensitive tummies. I had read and heard that a diet higher in fiber can help cats with sensitive tummies. They would get diarrhea and have loose stools.

I started feeding them Chicken Soup For The Cat Lovers Soul Light dry formula and this has helped them a lot. It's much higher in fiber and even though it does have some grains like rice, oats, and barley, it doesn't have any corn or wheat in the ingredients. You can buy large bags of it and the price isn't too bad either. They love it. Good luck.

They also sell CSFTCLS in adult hairball formula in the canned form and it's also a great price. I still can't give A & B too much canned food or they'll have loose stools. I've been giving them some non fat chicken broth and every few days I'll give them a very small amount of canned food. Good luck.

Here's the website to the food: http://www.chickensoupforthepetlover...ats/adult_cat/.