I'm working with Shae on doing tricks or commands. She sits really good on command and lays sometimes with a treat. Are there a certain way to teach them to lay and roll over? I mean like a hand motion or something? I've been on the floor going from a sitting to laying position and then rolling over to try to get Shae to do it. Shae sits with her head cocked side ways as to say what is this dummy doing and my husband is ready to call in the men in white with the straight jackets....