I’ll second what Fishduck said. My female fox red which is 4 now would scratch, chew, to the point she would create bleeding sores, couldn’t sleep and I could tell she was miserable. I tried different foods, shampoo, everything under the sun. Finally the vet told me it’s something environmental and I could spend a lot of $ only to find out it’s grass, oak trees etc. So I started her on Apoquel and it flat works. Once it’s under control I give her a half pill every other day to keep it at bay.