thank you for all your messages/replies but can any tell if they are having the same problems as me, Alfie has been going to obedience classes since he has been twelve weeks old, and is really good at class lessons, but at home when I ask him sit stay etc he barks at me and nips me, even when I play ball games never tug he goes to nip me all the time, and at other times he is jumping up at me and if I tell the command off (as from the training class) he often barks and even growls at me,the class instructor has told me to turn my back on him and stop the play but this makes no difference he just starts running what I call loopy through the house and if I try to stop him he growls and trys to go for me so I have to hold him down on the floor until he calms down, but this is a worry as I have young grand children so if anyone can help I am willing to try any thing as I love Alfie