Mummz - I would think that looking at the color of the leg, she has something broken. That is the kind of bruising you would see with broken bones. I am sure it is hard to see if there is a break because she is so small. I don't know how you would fix her, necessarily though. I have made toe straighteners out of pipe cleaners and they work absolutely perfect. Do you think one might work on her foot and leg, like a splint? For the toe straightening, I use one consecutive length of pipe cleaner, starting at the back of the foot, double it back at the end of each toe and secure each toe on it with bandaging tape. I would then continue on up to the hock (first joint on the leg) and double back to end at the back of the foot again, Maybe even give her an additional toe out of the pipe cleaner to help her with her balancing. I would try a half a drop of baby Tylenol before aspirin since aspirin is a blood thinner and you don't want to cause her problems with having her blood thinned, it needs to be able to clot properly for healing purposes, and where there is bruising there was bleeding.
I would give that a try.
Good luck.