Mange does go away by treating with ivermectin. Now, this is lifetime.. will have flar-ups and skin issues of and on. But the ivermectin will make this episode pass. You may get lucky and never have another problem. This is a result ov bad breeding- you cannot breed this puppy because they pass it on this way- Coccidia and Demodex mange are common problems wth "puppy mill" dogs. You have a very common and treatable problem.... don't worry too much.