There are TONS of Amish near where I live, a LOT of them are puppy mills. There are MANY adds in EVERY newspaper in & around the area from Amish selling puppy mill dogs. (you can usually spy an Amish add as it says no sunday calls please) I am not saying all are bad, there are many things I like & respect about the Amish too but in my area & in my experience most of them in my area do run large puppy mills.
The following is MY experience with them in my area.

My brother bought a pug from them last year. The Amish family they got her from told them if they ever needed any breed of dog to let them know because if they don't have it they can get it from one of the other Amish families in the area. They were expaining how their one neighbor (Amish of course) raised this breed & that breed, then the other Amish family on the other side of the road raised this breed & that breed, and so on. [Most raise at least 2-4 different breeds, some up to 10-15] Within about 30 minutes they mentioned almost all the different breeds of dogs & all were available (as in puppies ready to go to a new home) within a 20 minute drive.

The old vets office I worked at had a LOT of Amish clients, of course you hardly ever saw them. They only brought in their dogs if something was MAJORLY wrong or if they had an illness for an extrememly long period of time that they were unable to control on their own. So many Amish dogs came through those doors in very poor condition needing major medical attention. Many were on deaths door, yet the Amish would not have them put to sleep humanely, they would bring the dog back to their home & who knows what after that. Do they kill them? Do they let them pass on their own? I don't know. In my experience they generally don't take good care of their animals.

Missy worked at a local pet store when she first got her. They get ALL of their puppies from the Amish.