So one of my females, miss Rue, who is 10 months old, has a mammary tumor on her left side that's slightly smaller than a half ball or ping pong ball. It doesn't seem to bother her much. It was pretty fast growing, but hasn't grown much lately. It doesn't impair her walking, doesn't seem to hurt her. She's still super active and still washes my fingers and runs around with her sisters. I'm really thinking of having it removed, but I don't want to put her through major surgery if it's just going to come back with a vengeance (which is what often happens with human patients when they're operated on for cancer according to my mother who's worked as a nurse since her twenties). So what do you guys think, especially those who've had a rat go through similar surgery? Did they get another tumor? Did they recover from surgery okay? I'm just not sure what to do here. Money isn't an issue, her quality of life post surgery is.