My two and a half old mutt, border collie x, has learned sit, come, lay down, shake a paw and no. She will only shake or lay down if I am offering her something. The few times she has done it just because ive asked, she got praised for it...I don't know if it is just because sit and come are the first commands she learned and she is comfortable with them or what. Shake is sort of a novelty trick and I don't much mind if she only chooses to do it of I have a piece of cheese in my hand, but I would like to be able to tell her to lay down from across the room and have her listen. Any thoughts or suggestions?