I think I've heard a couple of you out there say you're dog trainers. I was wondering if anyone should give me a little insight into the problem I'm having with my boxer. I have two other dogs that I had before her, and she was a rescue. She's for the most part obedient, and never aggressive towards humans. But during the last week, we've been notcing some aggressive tendencies toward other dogs. She's been attacking our other dogs, often where there is no initial agitation or badgering by our other dogs. This morning she attacked our puppy for standing in the doorway to the room. It's inexplicable and seems sudden. Our neighbor called us today as well, to ask us to keep her in the pen, because she's been biting one of their dogs. Does anyone have any ideas on how to make her more submissive in her interactions? This really can't continue. Thanks.