LuvMyLife1010 -- Since you pup is older - with more aggressive behavior that is becoming worse -- I'd just look for a wonderful new home for her and not feel a bit guilty. You would be doing what is best for everyone.
I've been through this with a pet (not a dog) - and sometimes it takes a while to find the right new home. Many people will offer to take her that you know may have the same problems that you are having. Don't accept that. Look a while and be very selective.
She will obviously do better in a home with no children - and may even enjoy being the only dog. Because she behaves well with just you, she will probably bond well and behave for a new owner --especially if she has no competition or other pets or children to distract her. I'll bet she could be a lovely affectionate pet for the right person(s).
You can't let her bite your daughter. I think you have your hands full with a family and another dog, and this makes it even more difficult to re-train one pet. Plus - chances are that a lot of work won't change her behavior anyway.
Only my own personal opinion -- If I were you, I'd continue to work with her and in the meantime start looking for the perfect home for her. As I said, finding it, may take a while.
I'm also thinking that there really isn't any reason you shouldn't be able to have a second dog. Most dogs behave well with other dogs and children. Unfortunately, I think you just got one that doesn't. And, I agree that since she was a rescue dog - her previous treatment is probably a part of her problem today.
Please remember ---it won't end up a sad story at all - if your little pup finds a new home where she's happy and loved.....and can't cause the problems that she's causing you. At three, she is still very young, and I would think a lot of people would enjoy starting with a dog that age.
I wish you the very best... Carol Jean |