He has gotten much more "nippy" lately. I can't tell if its playful because of pent up energy or something is bothering him. He wears his blankets most of the time. My trainer said that the winter coat plus blankets can cause more static which can irritate them. He was much more docile all summer. Sometimes he sort of bites the air like he is "pretending" to bite me. He's never actually done it. He also swishes his tail when he does it.
Is he just feeling good in the cold weather and playing? Should I correct him when he does it? If so, what is the right way to do that? I certainly don't want him to be head-shy.