Hey, I was wondering if there is anyone who could help me. My west highland terrier mix has recently started nipping at ankles and barking at anybody who tries to leave the house. As soon as anyone walks to the door, let alone open it, he’s angrily running at you! I’ve tried changing my routine to help him get out of his routine, but it doesn’t seem to work? I can only assume it’s due to him becoming older, and so possibly trying to dominate us? But it’s starting to get worrying as I don’t want him to be stuck in this loop! If anyone has any idea of why he’s doing this, or how to stop him, please do let me know! Thanks!