Can you try Buzzy on a food that doesn't contain poultry and see if that helps? Poultry is a common allergy for cats.
Buzzy has only ever had poultry-based food, because I believe it was either beef- or fish-based stuff he seemed to have a reaction to in the past. So I remember just like...choosing chicken and turkey forever since then.
Obviously, if this doesn't work, I might have to look at a protein he's not had before. But, then it will likely be higher in carbs...because Natural Balance venison & green pea is about the only thing I MAY be able to really afford/find around here...
I bought some Whole Earth Farms turkey pate & he gobbled that up, so I'm going to try that. It's not AS "clean," but no byproducts.... it does contain both turkey & chicken though
It just makes no sense bc he ate that Purina DM for 2 weeks and did totally fine on that (didn't show hair loss til 2 weeks into eating Fancy Feast though), and that's got byproducts & everything junky in it too! Argh!
The only other thing...oooonly other thing that could POSSIBLY be the issue is that I thin that changed their litter from Tidy Cats scented to Tidy Cats Free & Clean around the time this started, which has no perfumes/dyes but does contain activated charcoal....I've never ever heard of a cat being allergic to activated charcoal & he's not chewing at his feet, so that seems unlikely.....
Or he's allergic to the lancet...?! IDK.
Whole Earth Farms Turkey recipe:
Turkey, Turkey Broth, Chicken, Turkey Liver, Chicken Liver, Natural Flavor, Dried Peas, Dried Egg Product, Sodium Phosphate, Calcium Carbonate, Organic Dehydrated Alfalfa Meal, Flaxseed Oil, Potassium Chloride, Salmon Oil, Salt, Choline Chloride, Guar Gum, Taurine, Agar-Agar, Flaxseed, Locust Bean Gum, Xanthan Gum, Cinnamon, Vitamins (Vitamin E Supplement, Thiamine Mononitrate, Niacin, d-Calcium Pantothenate, Vitamin B12 Supplement, Vitamin A Supplement, Riboflavin Supplement, Folic Acid, Biotin, Pyridoxine Hydrochloride, Menadione Sodium Bisulfite Complex (source of Vitamin K), Vitamin D3 Supplement), Minerals (Zinc Amino Acid Complex, Sodium Selenite, Manganese Amino Acid Complex, Iron Amino Acid Complex, Copper Amino Acid Complex, Cobalt Glucoheptonate, Potassium Iodide), Rosemary, Sage, Thyme.