This is a tough poll, since 3 of mine came from shelters, and I have no idea where they originally came from.
Kito was definitely bred through a reputable breeder, as he was supposed to be a show dog. Unfortunately, the woman who owned him and his sister got very ill, and had to rehome them.

Abbey came from a rescue, who got her from a shelter in Ohio.
Riley came from the parking lot of the SPCA, and I have no idea where the woman who gave him to me got him.
Jada came from the SPCA as well, and they had no information whatsoever on her.