I just caught this thread, and I'm glad things are going better. It sounds to me like her regression was party just because she was scared. Was this her first litter of puppies? Just think about it from her point of view - until she came to live with you, she only knew abuse and neglect. Now she is with a family that loves her. And all of a sudden, she has babies! That's definitely something to freak out about! And, I'm sure the visit from her previous owner didn't help. Even if she didn't remember specifics, I'm sure she still associates him with "bad". I'm sure she'll continue to improve. You are a good person for spending so much time with her and adopting a "difficult" boxer. Your hard work will pay off, it sounds like she's starting to become a great dog.