The puppy must learn to respect the other dogs around it. This teaches the adult dog that you have his back and he does not need to all out attack puppy because you will help. YOU are the ultimate leader, not the older dog and you must ensure the puppy does not harass the older dog. Usually a puppy can out play an adult, but this goes both ways.
What to Expect: Introducing a Puppy to Your Adult Dogs. By Laurie Luck on 08/01/2013 When you compare the way puppies play to the way adult dogs play, the differences are vast. Dogs follow a prescribed set of rules. Say your dog doesn't growl or get up and move if the puppy lies down beside the adult dog. Reinforce that!
Jun 13, 2016 · When your older dog wants to play, let him set the tone of the play. If the puppy or young dog is too rough and the old dog corrects him by pinning him, barking and growling, or otherwise telling him off; that’s fine. However, when your old dog gets tired and has had enough, help him stop the play.