My father bred one of his top gun dogs (Beagle) when I was a kid, with another friend's good Beagle. Both papered. Or so he thought. The dogs were together for a few days and although they never actually saw the act, all indications were that it had occurred. Interestingly enough, the next door neighbor, a 80-ish year old Eastern European immigrant (a very cool guy actually) who spoke broken English, raised and ate rabbits and chickens, eggs and all. Grew grapes and made his own wine - u get the picture) had a very mean curly haired, black as coal dog. Butch... he bit everyone in the neighborhood at least twice (you gotta remember now young folks, the times have changed quite a bit since the 60's). One day, my Dad caught him trying to let Butch in the pen with his dog, cause Louie knew she was in heat and Butch was constantly hanging around and trying to get in the pen. My Dad, of course stopped him and said "No, Louie", "please don't do that". Louie said, "why you don't let him".... My Dad just explained that he didn't want mongrels and that he had already bred her. SO the story goes... he thought that was it and he never saw anything suspicious again. Until his dog gave birth. One (1) beautiful tri-colored Beagle and 6 Black as Coal curly curs. My Dad was soooo mad!!!!