My Gluten Allergic Cat Likes It

I have two cats with special needs. I have one with an autoimmune disorder which will affect her for the rest of her life and a cat severely allergic to wheat gluten and dairy products. I was stuck on what to do when it came to cat food because most of the gluten free food is expensive and my cats eat more than I can afford at that rate, but this brand of cat food which is sold at Dollarama has a corn filler and even though it’s not the greatest filler out there, it doesn’t send my cat to the toilet several times a day barfing and with diarrhea. Yes I have a cat kind enough to vomit in the litter box! If I can find a wet food without corn or gluten I will get that instead of this brand, but to keep hungry kitties full this is usually on my shelf.