[MyDearSam]

Sam and Piper do this all the time. Except there's lots of snarling and growling, with Piper usually making the most noise. I swear sometimes it sounds like they are trying to kill each other! They will run, wrestle, jump, box, roll, nip and growl at each other for hours. When they get tired, they'll stop, grab a quick drink of water or a couple of kibbles, and off they go again. They share toys, bowls, beds, and laps so there's no resource hoarding. It's just the way they play.