Breeders breed for looks and that is a problem. They sometimes inbreed the dogs for looks and not companionship, which leads to disease and illness.
Depends...
I tend to ask a lot of questions. So when my g/f & I went back to the breeders for weekly play dates after we had the pup....I began asking why she bred her bitch with that particular stud. Looks of course are right up there, but so is temperament. Also, there was a lot of other things taken in consideration like hips, elbows, etc... Believe it or not, she has excellent blood-line history of both & how she made her decision.
My g/f had to sign an agreement with the breeder that we would not stud the dog until he was 2 & had been checked out. She runs a reputable kennel & doesn't want his name (which is her kennel name) being spread all over the countryside with dogs with deficiencies. There was more to the agreement, but we really haven't sat down & looked at it because it's not a big priority at this time & the pup is just a year old. All the time, we get stopped because people see him & instantly want to know if we will stud him. The way he looks & the way he carries himself attracts attention. When we tell them "no" because he's too young & we have an agreement with the breeder....they react pretty weird. The first response is "well, we don't have to tell your breeder."
I don't know...but stuff like this is where it all starts. Stud fee's can bring quick & easy money for little or no trouble.