I have a purebred pug and I also got my black lab from a shelter, I don't know if he is a purebred or not, but I use to have another black lab, and I got her as a present... and she had puppies with the other black lab. We gave homes to all of the puppies exept one of the yellow ones. I was still living with my parents, and they wouldn't neuter the male black lab that we got from the shelter.
The purebred pug we got from a breeder, but I don't know why, but I kind of did save him.
He had a really bad eye infection that started out as a white cloud in his eye. The breeder wouldn't have spent the money for surgury like we did.