What breed is your other dog? The Wheaten is a terrier and very territorial. He is trying to assert his dominance over her. It's natural behavior and they will usually work it out amongst themselves. If a large breed, she is becoming sexually mature at 2 and he is wanting to maintain control. The Wheaten is a dog aggressive breed, so you will need to really work with him on dominance issues.
Answered by buttons652 - 11/14/2011 12:52:58 AM