Breeder vs. Shelter

Is it realistic to think that pet stores could go out of business.  I doubt it because I don't think there are enough breeders to accommodate the demand.

We didn't pay to have Hadley specially bred.  At the time I first found the breeder, she was already alive.  Someone has to take care of her.  If everyone agreed to boycott all breeders then what would happen to all the puppies?  It's a circular argument and I'm not sure what the right answer is.  I believe adopting a shelter dog is a wonderful thing if it's right for you.  It wasn't right for me.