This is so much FUN and so very COOL!! I have set remote cameras up to catch My WOOFPAK in the ACT of being like their ancestors and relatives the Wolf!! You will see them acting and behaving similar to life in The Wolf-pack!! Wrestling, Rumbling, Tumbling, Biting, Pulling, and all kinds of physical engagement. My background and experience in the Martial Arts has taught me many techniques where named or in some way resemble animals and other creatures. This is because of their ability to execute and perform techniques and moves with accuracy, economy of movement, and proper force. In a Wolf-pack this play is again normal and healthy, and in My WOOFPAK it occurs for the same reason. None of the Dogs ever get hurt and this is all in PLAY!!