Quote Originally Posted by buttercup132
Personally I classify anyone who doesn't breed to better the breed a BYB.
Initially I was going to second (or third) this, but then I read the below one and liked the way it was worded a little better.
Quote Originally Posted by Flatcoatluver
To me a byb is a breeder who doesn't health test there dogs (example. Hips, eyes, thyroid, elbows, and etc) also someone who doesn't show there dogs, so they don't know if there standard, or if someone doesn't field test the sporting breeds, herding with the herding breeds.

Someone who does it for the money, there dog's could be parents, because there dog's make great pets, there dogs are cute, or they want double of there dogs
Although my quick easy answer would be the same as buttercup's, it doesn't say enough about what is meant by "better the breed." A Backyard Breeder is anyone who does not do everything necessary to make sure through proper temperment testing, physical testing and comparing the traits of the two dogs to be mated to attempt as best they can to ensure that the puppies will grow into physically and mentally sound dogs that can behave in a manner that the particular breed was meant to behave (be it hunting, protecting, or just being a companion animal).