I know there are already alot of posts as to what can happen with a BYB pup, but just wanted to add my 2cents
I also bought Boomer from a BYB-(before I found this site and learned better)-now don't get me wrong the dogs stay in the ladys' house, are very loved, and aren't really treated like proverbial "breeding machines". Boom's mom has only had two litters, and that's going to be all from her, but they still don't do the proper health test, and, luckily, Boomer hasn't developed any serious health problems. However, he does have severe allergies, and has a MAJOR yeast problem, that is, from what I understand VERY hereditary. After I had him diagnosed, I called the "breeder" to tell her and she said "Oh, well, like mother, like son, I guess." WHAT? You knew she had these problems, but you still bred her-TWICE. She said her vet told her that the mother had "outgrown" the problem, and it was a slim chance of the puppies having the same issues. YEAH, RIGHT! The mother was beautiful when I went to look at the pups, so it does give me hope for Boomer, but it's been a long, and very expensive road, and he's only 1 1/2 years old. My vet says the chances of him "outgrowing" these issues os slim and none.