Bringing home a new puppy is definately not easy and dont be disappointed if they dont end up as playmates. Just give it time, and some correction from the older dog is absolutely necessary so unless there is true aggression and the older one actually wants to go in for a bite, dont get to worried about the snarls and growls, its outright aggression that is a problem, not a normal adult dog simply teaching a puppy on the proper rules of doggie etiquette.