Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
How long has he had hair loss?
Is it up over his shoulders or down near his tail?
Any changes to the skin (ie pimples, pustules, crusting, scaling, dander)?
Has he been grooming or itching more?
Can you take a photo of this? If you can do so and post them online, it will let me see what you are seeing. To post them, you can either use the paper clip on the tool bar. Or if you cannot see that on your phone/computer, then you can post them on any site (ie Flickr, Photobucket,Imgr etc) and paste the web address here for me to have a peek.