[matese]

These are normal 12 week old babies, that's what they do, play, jump, run,nip & bite. If the old pups don't like it they will escape,go to higher grounds, the sofa, or just get out of reach of the new kid. Have a safe haven for your older ones, a safe place where the puppies can't get at them.
mygirllacey if Lacey didn't enjoy the puppy play she wouldn't be on the floor with puppy, be happy Lacey gets along with the new kid.
blancla I am against spraying the baby, this is natural for a 12 week old to do, play, play and more play. Watch that your older girl does not hurt the puppy, she is trying to teach the puppy to "back off" give your older girl a get away area, where the puppy cannot get at her. When I had older girl and new 8 week old baby girl, my older one would stay on the sofa, away from baby jaws, she was safe. I cannot suggest how to control this, I always let my older ones and new babies work it out, but made sure the older ones never hurt the puppy. I was lucky that my older girls were sweet and never tried to nip back at the puppies. I say let the puppies be who they are which is puppies that love to play all day till they knock them selves out. How I miss those beautiful puppy days.