Quote Originally Posted by dab_20
Oh, wow I never knew that!!

I believe it. It can happen with rabbits, so why not dogs? I think it's kind of irresponsible if people do that, though.
For mixed breed dogs and purebreds that aren't breeding quality, yes.

But most breeders do it for a good reason. If their bitch has already had two litters and they want this to be the last one, yet they have found two studs who equally balance out her faults, then they could both be bred to her this time since it will be her last litter.