im new to this forum, my wife has been getting advice about our puppy arlo, who is now completly healthy,and to the point active. i read on here to discourage such behaviors as tug of war and growling, we also have a 1 1/2 year old schnauser mix, who is INCREDIBLY ACTIVE. they play quite a bit and arlo gets really into it growling bouncing and is quite assertive trying to be dominant already (7weeks), tug of war with a rope toy being one of their favriote activities. it does not appear to be agression he initiates the play. but is this something i should nip in the but. the two seem to have bonded they interact well and there are no other signs of agression. should i be concerned with agression as he gets older and is there anything i can do to control it now.