Do pet shops buy there animals from wholesalers??

They buy from wholesalers who get all their puppies from mills. I live in a part of the US that is huge on mills. And the people who buy them are called brokers. They actually hold auctions where they sell puppies by the truck load! I have seen one at a truck-stop along the highway once. Its horrible. Never buy a dog from a pet shop. They often have 'papers', but they are not hard to get. I also do volunteer work for a group who occasionally gets dogs from mills once they get shut down. Although the people just move, and open them again with new dogs in m breeding programs.