How old is she? At this point I think I would ask for x-rays, just to know what I was dealing with. Yes, soft tissue injuries can take weeks, even months to heal, and rest is a big part of that, hard for an active dog! My friend's blue tick coonhound had a lot of problems with her feet/toes, I don't remember exactly what now, it has been a few years, but I know surgery was involved.