Ok, I'm a little behind here, but I"m going from personaly experience, have a dog that is allergic to what it looks at!!!
ALLERGIES! To what, no sure, cold be anything and everything, grass, mold, mites, food, dander, etc.
long term control, and i mean control, no cure. Work on keeping things to a dull roar. Douxo treatment, steroids, pulse antibiotics, Cyclosporine (atopica).
You need ot keep a journal, record when outbreaks happen, seasonal, all year round, certains foods trials. Its a commitment though and I'm seeing it more in bullies off all sorts, as well as some random pure breeds. Goldens, labs, westies, bullies, dobes, boxers....bull dogs...allergy testing shows waht it is, and you can't always sort it out of your life style....all you can do it keep on top of it and keep irritation down to a dull roar.
good luck! I feel the pain, but my rescue girl it totally worth the sacrifices of some skin issues....makes me a great side kick!
Ryder - Rescue APBT
Panser on a Roll - APBT (American Bully?)
Gretchen - the red headed cat that thinks shes a dog
Prudence - the new cat on the block to put the dogs in their place!
Punchlines Better Than Lojac - APBT (RIP)