Go there pretend to be interested buyer, ask to see proof of 'papers' on a potential puppy note the breeders name and kennel name anything else you can get from the papers...I traced my pound dumpee back to his pup mill and the breeder and the company that brokered all her sales because the genuises microchip the pup and register them in their name...so when they dumped him and another designer reject at the pound they just scanned their chi-noted another one of these dogs (they just claim the new owners dumped the dogs they protect clients blah bs blah)...anywho...here's some links.
  Minina Hates Puppy Mills | Facebook
Above will link you to various groups who educate and advocate.  
SPCA International: Fighting Animal Cruelty  Puppy Mills : The Humane Society of the United States  Badger Kennel Club, Inc.-- About Puppy Mills  Puppy Mills: Frequently Asked Questions : The Humane Society of the United States  Wisconsin Puppy Mill Project, Inc.: Identifying a Quality Breeder  How to Identify a Puppy Mill over the phone  Is there a list of puppy mills somewhere on the internet? - Yahoo! Answers
Above you can't use for a research paper if APA formatting is required I forget if it passed MLA anyways it's just a quality answer you could read and NOT plagiarizer but paraphrase...  
No Puppy Mills Canada  Pet store chain linked to puppy mills - Health - Pet health - msnbc.com  http://www.aphis.usda.gov/publicatio...al_dealers.pdf  USDA - APHIS - Newsroom  USDA - APHIS - Newsroom
Best was saved for last...
Good Luck!