In my opinion, the only people who should be breeding are the people out there to better a breed. They breed to the standard and breed not only for appearance, but for temperament, health, and working ability also (IMO, appearance should be alst on the list...it is important, but not as important as the other two). They health test for any possible problem the dog may have. They show their dog in something. Be it conformation shows, working trials, etc. all in an effort to evaluate who is of breeding quality and who is not. A responsible breeder will only breed a dog to another dog if they think those two dogs are going to be an improvement to the breed.

Not to be rude, but you don't seem like a responsible breeder at all to me. You seem to be breeding just to have a new addition to your family because you/your family happened to like your Grandparent's dog. Everyone else has already said anything that I would've said, so I'm not going to go into anymore detail. I have no answer to your original quation, as I'm not a breeder and have no idea why things like that happen.