Owner of a gluten intolerent cat here. For 10 years I apparently tortured the poor thing with quality dry cat food. She was an overgroomer -- had basically no hair on her belly and thin everywhere else. Vet said the same thing "psychogenic alopecia".

Reading some posts here had us switch over to canned. The barfing slowed down, but it was when we figured out the gluten correlation that we really got things under control. We started with Wellness, but as more and more cat foods are coming out with fewer unpronouncable ingredients and no gluten, we've branched out.

Turns out we've now removed Wellness from the list as we were having small incidents every now and then. Wellness has some foods with gluten so we questioned line contamination. It is looking like Wholistic Select might also be removed from our list (they have one flavor that has barley). The correlation isn't quite as strong, tho, and the cats like it so, for now, it stays.

But, since consciously trying to keep the gluten out of the diet, the barfing has dropped. It can make for long trips at the cat food store as we read the fine print ingredient on every can.

BTW, if your cat won't eat canned food, there are some gluten-free dry foods now. We've started adding some of the dry back in for days when we're gone all day without any problems.