Breeding where to go from here

Breed that young male to his half sister and hang onto all the pups. If it is a genetic issue coming from the male then it should definitely show in offspring that are doublebred off of that dog. It may just be an unlucky thing that happened, it's hard to say. If you breed them and keep the pups and it turns out to be hereditary then you haven't lost anything but a little dog food and a few .22 rounds. If you breed them and keep the pups and no issues pop up and they turn out to be good dogs then you are good. You can still try to get that young dog bred to that old gyp and then you have something to breed back and forth with for many years to come. Just my opinion