When she was about 7 months, one of the pups took what was a valuable "toy" to her pen. She was not giving it up, growled and snapped. It was the last time that girl challenged me in that way. I do not put up with crap from my big dawgs. When I was trying to teach all three big girls to walk together "little pup" got scared and went behind me, big pup and Rott continued forward lol. Back flip over the leashes with a bunch of face licks while down on the side of the road. Needless to say, we had some serious work to do. It's better now that they are a bit older.