my dog is becoming bald...

Sounds like Mange, though it could be an allergy, any skin desiease, possibly an infection. You can get quite a bit of information if you go to this website i just looked up. www.petstyle.com/dog/health_well_article.aspx?id=191§ion=health Reading down the page there are several possible reasons for this and information on what should be done. Losing hair, even in small spots is not good for any animal, they just don't normally go bald like people can. The best thing to do for him is take the poor thing to the vet. Hope this helps.