Free Provillus Review

My Chihuahua recently developed a bald patch on her hip and then another on her back, they are starting to get bigger. They do not have any kind of open sores or anything, just a little bit of dandruff. Does anyone have any suggestions on what is causing this or how to treat it?

He is a pure bred short haired black boy with white paws. He has a bald spot on the left side of his head. It is more like short short hair and you can see the skin through it.

The spot isn’t in a spot where his foot reaches so its not from scratching. It doesnt seem to bother him though its not sore but It seems to be getting darker and balder.