dog hair loss
I have a 4 moth old pitbull and today i saw some bald spots the size of a pea's on his back.
Is it because he is wearing a head cone?
I can't say for sure what is causing his bald spots I'm afraid, but if he's wearing something that is rubbing constantly in a certain area it's possible that could cause irritation and hair loss.
However, there are also certain skin conditions that cause patchy hair loss. One of the most common ones is Mange, and Pitbulls are one of the breeds that can be prone to developing this condition.
Your vet can make a diagnosis of mange, or whatever else is causing the problem, so I'd recommend getting your pup a check up with your vet soon. That way you can get him any treatment if necessary.
Best of luck with your pup.