A breeder shouldnt have sold a dog in such conditions. Although it does happen. That is hard especially financially right up front, I would definately get second and third opinions, maybe find a vet the boxers are their speciatlty. You can go through your local boxer club to find good vets. Once they make a decision on what is best for them and the dog do lets us know. There are lots of boxer rescues, Im not sure what area you are in though. I wish the best for you friend and her boxer.