Do you know any retired folks that could take her and would be able to be around for her? If you re-home her, you can screen the prospects and make sure they are fully aware of what she needs and how she is. Can't count on rescues to do that, some will some won't. She scraps with other dogs, that sucks but that's what they do. I haven't seen anything in any of your prior posts that indicate she needs to be put down. But if you can't find her a safe home you may have no choice. What does your gut tell you? Can this dog be a good companion in the right home or is she just to much trouble? Can you find her a new home? Check with the mods here, maybe some networking can be done to help find her a new place. Let us know how the two at the vets are. It's never fun to be where you are with this but when it happens think it through and do what will work. It may not be what is "best" but it does need to work.