This is my first posting. Our dog is an adopted 40 pound mutt about 2 years old. We've had her for a year. We know nothing of her history except that she was saved from being euthanized. She lunges and is otherwise aggressive towards other dogs when she is on a lead or at a dog park, behaviors for which we have worked with a professional trainer. We no longer take her to dog parks. She does fine at doggy day care, and has never had a problem at either place we take her.
Friends arrived at our house, and without warning, brought their little terrier into the house. Our dog attacked it, clamping down around its neck. We finally got them separated, and their dog was injured but not seriously so. They had been warned not to bring their dog, so we were not expecting it. What is the proper way we can introduce a guest dog?
Since we travel in a motor home much of the year, how can we work to turn her into a well-behaved dog around other pets? We currently use touch or a loud noise to distract her from fixating, and/or commanding/pulling on her lead if she begins to look at other dogs while she's on the lead. We're successful about 60% of the time, which is an improvement. Other times she'll jump, lunge and try to bite (she has bitten us).
Appreciate the help.