Hi and welcome to YT. I moved your post to its own thread for you.
Oh gosh, your poor poor baby looks just miserable

. Some questions:
- Why is he on antibiotics?
- Are you seeing a Vet Dermatologist?
- Was a skin scrape done and a culture grown out?
- Did you test for thyroid and Cushings?
- What allergy meds were tried?
Meanwhile, read this about allergies:
http://www.yorkietalk.com/forums/die...tart-here.html