she cant put it down and she would bite me if i try to see whats wrong or try to touch it.It happened because her and my other dog got into a fight and the dog went to rough on her.
Get a blanket, wrap your dog in it and get to the vet NOW!!! The longer you wait, the longer your dog is going to suffer and infection will set in. It's possible to save the leg if you act quickly. If you wait too long, the leg may not be able to be saved and might have to be amputated/
This definitely needs a trip to the vet and right now. The vet will want to do primary and secondary care. You do need to know exactly what is wrong to do proper treatment.