I found a few good links:
Humane Society of the United States: Petland Investigation - Pet Store Sells Puppy Mill Dogs:
Introduction Video: Petland Investigation | Humane Society Actual investigation. One breeder does her own spaying and neutering without anesthesia, and she's not a vet.
Petland Investigation | Humane Society
Here are a few consumer complaint places that have lots of complaints regarding sick dog, and while I'm sure Petland gives the charities a healthy dog, this isn't true for many families.
Ripoff reports:
Ripoff Report Search Results: petland Complaints.com: Complaints Against Petland
This was written by a former employee:
The Voice for Dogs.org What Petland doesn't want you to kow! First hand account of abuse behind closed doors as told by ex-employee Let's end dog abuse now!
We need to let the charities know that what Petland is saying about buying from reputable breeders, just isn't true.