What I'm not entirely sure of yet is whether another operation to remove the metalwork will have an outcome good enough to be worth the further pain, endless bandage changes etc. If it really didn't heal and had to be amputated, I'm not sure how well she'd cope, given that one front leg can barely bend and is badly arthritic already.
I'm going to give her a week of complete rest (which will not delight her) and see what it looks like after that.