What I do with Chewy (our 4 month old puppy) is put treats in my hand and show him i have them and then jog around he will chase me till the end of the earth and back if he hadto to just get some of those treats. after a little he becomes tierd and I'm usually the one saying o come on lets play some more. LOL. Since it is so hot neither of us have any energry so we spend lazy days dog figthing on the couch, not real dog fighintg, just me and him no other dogs are in this and no one is harmed expet me, hey he can bit hard!