I think the best thing you can do is make sure they get the puppy to a vet and commit to regular visits. Vets, being expensive and fairly intimidating, can be more convincing to headstrong people (I'm assuming your friends are, since they blew off your advice pretty strongly) than even personal contacts.
I feel your frustration, though. When my sister bought her first dog, she ignored everything she heard from everyone she knew who'd had experience in buying/owning dogs, and impulsively adopted a vicious little monster from a shelter so lousy the employees actually let her take it home without it setting foot in a kennel. The original owners were in the process of surrendering it when my idiot sister walked in the door and decided it was cute. Me and our mom had told her repeatedly that this was a bad shelter, that it was overcrowded, badly run, filled with aggressive dogs because it was a halfass 'no-kill' shelter that accepted rank street dogs from poor areas. God only knows what happened to the majority of those dogs. Crazy.
I feel your frustration, though. When my sister bought her first dog, she ignored everything she heard from everyone she knew who'd had experience in buying/owning dogs, and impulsively adopted a vicious little monster from a shelter so lousy the employees actually let her take it home without it setting foot in a kennel. The original owners were in the process of surrendering it when my idiot sister walked in the door and decided it was cute. Me and our mom had told her repeatedly that this was a bad shelter, that it was overcrowded, badly run, filled with aggressive dogs because it was a halfass 'no-kill' shelter that accepted rank street dogs from poor areas. God only knows what happened to the majority of those dogs. Crazy.
