My Girl had same problem - psoriasis
Hey my girl had the same problem, vet kept giving me antibiotics.. I researched and found out it was due to joing/ arthritis issues. almost like having psoriasis. I bath her every month, with a lime dip I purchased on Amazon. I do this religiously, if I stop bathing her with this she breaks out, her hair falls out starting at the head and her back and her belly. It's very sad to see her go thru this and the itching that happens is also very bad. - Sulfur lime dip- look for it the bottle is no more than 20 bucks and it last. Please do it ASAP.