I don't care what you say but any reputable breeder that I have ever met (personally or on the net or by phone or letter, talked to or heard of would never ever put one of their loved pups in a pet store.
even back yard breeders can get lucky & end up having a show dog some out of the litter.
Reputable responsible breeders ussually don't even breed unless they already have homes lined up for the pups, and secondly expect to keep the ones that the owners back out of, or return.
Ditto, Also isnt it illegal to sell registered dogs to pet stores, i know it is here and the breeders would be shut down promptly.

If they Cross breed they are not responsible. JMO.