My Chihuahua Is Really Itchy And Has No Sign Of Fleas. He Is Missing Patches Of Hair From His Nose And The Vet Said To Just Wait? Does Anyone Know What It May Be?

I had a English Bulldog that lost hair from his sides. Dr. Did allergy tests and tried medications - still no hair - I finally said he is in no pain and not sick - he didn't lose anymore hair. I left it alone. It was kinda cute like someone just shaved him in those spots.He was way to big to reach them to scratch - it was different.

Loosing hair is a sign of old age.

Its mange you can get a medicine to treat it.