I just want to commend you on starting out right. Years ago when I started breeding, the same thing happened to me. I paid alot of money for a breedable female that had a roach. she was beautiful in other respects, but I didn't know any better at the time. I found after trying several different studs with a good topline, that a roach is almost impossible to get rid of. It seems to be a very dominant gene. Not to mention (at least IMHO) one of the worst. I gave it up, and am now set on a new course. This forum is a great place to learn and try to keep on track. I would suggest if your breeder won't replace him, that you neuter him and sell him. Never be afraid to start over. Good luck, and try to post pics for us, ok?