Thanks for your reply,Alopecia
(hair loss) in dogs can be due to many things. Usually we recommend scraping the skin to look for mites (demodex) , doing a tape preparation to look at bacteria, and taking a hair sample to culture fungal organisms (ringworm
). Some of these things are very itchy and some of them are not.
Prescription sulfur shampoos can treat some of these problems, but I wouldn't count on over-the-counter shampoos to be much help. They also need to be administered at regular intervals during treatment and are usually accompanied by oral medication as well.
Other possible causes, that are usually itchy, include scabies, flea allergy, and food allergy. There are also some endocrine diseases that can cause hair loss (non-itchy). Cushing's disease and hypothyroidism
are two examples. Cushing's disease is much more common than hypothyroidism in reality, however hypothyroidism is grossly over diagnosed.
My recommendation would be to talk to you vet about these possibilities. If they are uncomfortable doing an in depth dermatology work-up, you can request a referral to a dermatologist. Not every veterinarian is an expert in every aspect of medicine. Most veterinarians do not mind referring cases to specialists if they are uncomfortable with certain areas of medicine.
I hope this helps,