Thank you LaurieW, Sam is indeed a very good dog and he is willing to learn. I can see his smile, everytime i go and get him for another walk or just to play with him. ( Sam is an outside dog for the summer, and has his own dog house outside). He gets so excited, everytime we are taking him off his outside leash, just to walk with him, that he hurts my son or my wife with his nails or play biting theeths. I am the only one that can take him of his leash without getting hurt. and sometimes, i have to discipline him, before i can leash unleash him. He gets so excited. but i do understand why. He is on a leah the whole day, outside, until we come home. So he is happy to see us all. I cannot blame Sam, but it has become to a point that my wife and son does not show much interest in Sam anymore, because he is just to wild to handle for them. I can handle him. dont matter how big he is and gets. But for my wife and son, the scratches and play bites are to much, they cannot stand up to Sam. They do not have the physical power or strenght. Now i told them, it is not about your power or strenght, it is all about the way you present yourself in front of the dog. Your posture, your voice, your actions, your moves, your body language and your brains. Just stay calm and give Sam no attention when he runs up to you to jump you........... ....... stick out your knees if you want to, to avoid the jump. Make Sam know that you do not appreciate what he is doing. Hurt him, i know, sounds bad, but only once, if you can, just to let him know that he cannot do this again. So he will understand that his actions will have results he wont like, painful ones. But, it does not help, although, Sam is getting a bit better with my son. Which i am involving, my son, in every minute, which i spend with Sam, for a week or so now.