"Shake" ...uh, I don't get it....!
One of my pups is 13 months old and knows Sit, Down, Stay, Off, Back, Leave It, and Okay.
I've tried teaching him "Shake" but he doesn't get it. I kneel down with him, make him sit, tell him Shake and then pick up his paw, tell him good boy, and give him a treat and praise him. He loves it but he doesn't understand the command.
The reason I don't think he's making the connection is because first of all if I tell him Shake he just sits there and doesn't move and then if I get upset with him when he does something wrong (like chewing up my comforter again or something!), he starts trying to give me his paw. He knows that I praise him when he gives me his paw so when I'm upset with him he tries to make it up to me. He just doesn't understand to do it on command...