I have a fairly new horse (bought at the end of last summer, so didn't have much nice weather to work with him) who is very mouthy. When your doing something with another horse or sometimes either him he nibbles at you. Over the past few months he has gotten worse and actually more of a bite but not like an aggressive bite. If that makes any sense at all. I know he is not in discomfort or anything. For example the other day I was out brushing him, getting all his winter coat out, and he was totally fine. He was actually falling asleep while I was doing it, but as soon as I quit and went under his neck to put the brush away he turned to bite at me. He is very pushy on the grounds due to the owner before me not doing anything with him and just letting him sit in a field for years. Please help before I lose a finger, lol just kidding. But any tips or advice from previous mouthy horses.