Is your question how do you find out if she (the breeder) is running a puppy mill? Did you check the USDA list for her name? We really need more information to help you. Is the puppy being treated for the worm issue? If you give us the name of this woman we will be able to direct you in the proper direction to get to the bottom of your issues. Who has this puppy right now? Do they want to keep the puppy? What breed is he~Yorkie????