I would try to educate them. I would also do as Pat suggested, make an anonymous call to the state and fed tax reporting numbers and let them know. Best bet is to also call the local Dachshund club with a heads up… they may be able to educate them better without them knowing you were involved and warn about false advertising etc.
Your state isn't listed in this Puppy Lemon Law list, but I have no idea how old it is: http://www.lemonlawact.com/what-exactly-is-lemon-law/what-is-puppy-lemon-law-320.htm
This from aspca is probably current
http://www.animallaw.info/statutes/stuslars2451_2778.htm#s2772
