THIS IS MY FIRST GSD AND I LOVE HIM TO DEATH BUT WHEN HE PLAYS HE PLAYS ROUGH AND ALWAYS GOES FOR THE FOREARM AND WRIST HE PLAYS ROUGH AND I DONT NO HOW TO BREAK HIM OFTHISI SAY NO AND HAND HIM A TOY OR I PUT HIM IN CRATE FOR A TIME OUT NEOTHER SUGGESTIONS HE ALSO IS VERY HIGH ENERGY