The ASPCA has been working tirelessly to shine a light on large puppy mills that breed dogs and sell them to pet stores. They are controversial to be sure. Just a few years back, these facilities were unregulated and some of them had really awful practices. Because of the work of the ASPCA and others, regulations have been put in place. These are to ensure that multiple dogs aren't cramped into cages, females are bred until they die, dogs aren't laying in their feces, etc. I know...you would think if you wanted to sell dogs your goal would be to create a healthy environment. But, many of these puppy mills are more concerned with profit than their animals. At any rate, one of the largest in the country shut down its doors this Summer. It was Lambriar Kennels in Kansas. You can read about it on the ASPCA blog: [url]http://blog.aspca.org/content/one-largest-puppy-brokers-shuts-its-doors[/url]