chris, it might be best to start your very own thread, so we can help figure out why
your dog is shutting down, and then THIS thread can be about Golden101's puppy problem.
first off, i'd get him to the vet. If *my* dog suddenly became listless, i'd be alarmed. (unless, he was hot, tired, or some known reason).
If your dog was scolded or hit or otherwise punished, had his toenails cut last night

and is now afraid you are going to do that again, etc,
did something weird happen to dog lately? that is a factor too. Has he eaten anything weird, or been given some medication ??
If you do post a new thread about your dog, Chris, link it here, and we can just go over to that thread to talk about what is wrong with your dog....just seems easier, imo.