Good morning everybody... This is my first post on the board and I'm glad to be here. Seems to be more useful information. Anyway, I have some very high strung animals that will bite when they want to be let go. It's not a problem with the smaller ones, they are 41 lbs and 38 lbs... I have trouble with the big boy at 52 lbs chain weight. The latter is a gorilla. Very calm and laid back until it's time to play and he turns it up, wwaaaaayyyyyy up. I do certain things to increase their prey drive and I have one he'll of a time breaking him and holding him afterwards. I wanna get a grip on this before I start his schooling. He will be 14 months old next month. From what I understand, this line of dogs is known for that and like I said, it's not a problem with the smaller ones, that big boy gives me a world of trouble. Any help would be appreciated. Thanks.