Originally Posted by KVR
Interesting... my boy has had issues with mange, thyroid issues, and skin allergies all at some point... the thyroid caused black skin/hair loss and the skin allergies caused red skin/hair loss. Maybe a food allergy? It's not uncommon for them to be allergic to "common" protein sources like chicken... the itchiness starting shortly after the diet change really sticks out to me. Did the vet have any ideas?