Janet you are so a wonderful person taking that cat to the vet. You really are getting attached to her.
I remember having a mix bobcat once and I don't ever remember him scratching any of my furniture. All thought back then I didn't have much. He did his business outside and everything.
I don't know if he wonder out or if he was stolen but that was my only inside cat I ever had. I got him when people were just giving away kittens