I found this via a Google search.
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3. There is a puppy mill in my area. How can I get the authorities to investigate and it shut down?First, please be aware that operating a commercial breeding kennel may not be illegal in your area. But if you have seen specific evidence of cruelty or neglect, such as animals without food and water, sick dogs who are not being treated, or dogs without adequate shelter from the elements, the first agency to contact is a local agency with law enforcement powers, such as the breeder's local humane society, animal control agency or police or sheriff's department. Prepare specific details of your complaint in advance, and get a case number or contact information related to your case. If you do not hear back from the local authorities within a week, please call them back to ask for an update. If you can't get local help for the situation or are not sure who to call, please contact the HSUS at
stoppuppymills@humanesociety.org. "