I hope the puppy is ok and not from a mill but I do have a bad feeling.
I have a dog I am sure came from a mill, she was sold to me from a puppy store who said she knew all the parents of the dogs and they were all local but the problems have been extensive.
I bought my yorkie
through a breeder who breeds for show and dogs that are not confirmation quality are sold. She was born with only one eye but otherwise healthy, I paid $500 for her. Her brothers sold for a lot more and are just as healthy. I had to still go through the application, supply references, vet's name and number, sign a contract to look after her (spay, send pictures every 6 months until she is 2 years old etc) in turn she gave me a full health guarantee and provided me with the Rosie's line and her registration papers when I have her spayed. If Rosie needs a new home I have to go back to my breeder so she can re-home her.