I think I found what appears to be a puppy mill online. I've never seen the place and I don't know the people but the website leads me to believe this is a mill. They offer 7 "purebred" breeds including yorkies and 23 "mixedbreeds". In their Q&A section it says they don't allow people to visit the dogs, they don't post pics of the parents becuse the dogs don't like their picture taken, they ALWAYS have litters available, they ship 90% of their puppies, the dogs are not raised in their home - they have a separate kennel for them and employ people to take care of them during the day, the dogs are not potty trained in any way, and they even put on there that they breed females EVERY heat cycle because it is healthier!
Anyway, I have no experience with puppy mills so I'd like another opinion. Here is the link to their website
North Country Kennels - FAQ's and information about purchasing a non-shedding puppy. - make sure you look in the Q&A section - that is where they state some pretty suspicious stuff.