Just came back from the vets. The good news is she has maintained her weight and is doing good considering. As for the back leg, it appears she as a slight tear in her ACL on the knee. The breast tumor has grown, but since she's not chewing at it and it has not been bleeding etc., surgery at this point wouldn't be a real benefit due to her age (14). She does have cancer, but does not appear to have spread. So i just need to keep giving her the anti inflammatory and pain meds on a daily basis as opposed to just when ever.
Here's a picture of her winking at me.