Still bald but has not gotten worse!

Brownie's balding has stopped but the hair he did loose has not grown back. I have been giving him Ivermectin for the last week and he had a flea collar on for a few days. I hope the bald spot goes away since he has beautiful wrinkles (if you see his picture on the right, he has show quality, per my pug books, wrinkles which you can not see anymore...sob sob). The only constant stress he has is punking around with his brother Porky but they do that all the time. I can't imagine that stressing him out to the point of having low immunity to mange attack. Hhmmm...I will do some further investigation and see...