Petland is a National Pet Store that sells puppies. It's one of the largest purchasers of Puppy Mill puppies - Go here to read about Mills and Petstores
http://stoppuppymills.org/
There is a TON of information on the net regarding mills - and if you type Petland - There is a major effort to get them to stop selling puppies -
http://www.petstorecruelty.org/boycottpetland.htm