My dog's hair is falling out in clumps, it is stiff like a horses tail, dull and has excessive itching. We have had him on predinizone, anti fungal meds, antibiotics, anti psychotics and everything is just getting worse. His brother has severe itching, been on some of the same meds, but his only symptom is itching, so I think we are dealing with multiple issues. Help me come up with ideas for my vet. We have had our dogs into the vet almost every 10 days.