Tell me about them... I think that our female cat may be dealing with one.

To make a long story short, she's our little anti-social darling. Easily stressed out, likes human contact only on her terms, and often tortured by her brother. When she started overgrooming, we (and our vet) drew the conclusion that it was psychogenic alopecia. But nothing we have done has helped to relieve her anxiety or the alopecia.

A few weeks ago, a thread here on TE got me thinking about a grain-free diet for her. I recently bought a few cans each of some different foods (not all grain-free). We're 2 days into one of the new diets, and I haven't seen her obsessively groom.

Am I onto something here? What are common food allergens in cats? The new diet, although not grain-free, does not contain wheat or corn. I'm wondering if she's allergic to wheat...

Thanks in advance for your experiences and ideas.