Considering all that you have going on, have been thru with your Mom, your sister, your sister's other dogs....I think what you're trying to do for Kouk is pretty amazing. It sounds like you care about Koukla, and that your first preference is to keep her...?
What about having a behaviorist come to your house, assess all of it...they may have really good ideas. Even people here at YT have wonderful advice about training, but I don't know if it'll apply to this situation. I would love to hear how Kouk does; I hope things turn around for you.
