If you have watched a litter of pups playing, they will growl in play all the time. When one has had enough it goes off to corner and lies down. If a playfull pup still wants it to play it will pull a tail or an ear or a leg, still growling and if it gets to much for the one who wants to stop there will be a loader scuffle and then peace.
This is a lesson they learn from each other and one of the reasons pups should never be taken away too early.
Games of tug in our house can be very noisy and when two of them have a one on one tug'o war with a rope its mayhem - but all in fun.
Border River Pet Resort