try putting a skin around some thing she can tug. get her into the game before adding the skin when she is into it play with her all of a sudden let go a run backwards making stupid noises hold in out your hands. if your lucky she may try to re initiate the game of tug and retrieve it to hand un knowingly kf she does make a fuss and play. do this over and over on seperate ocations stopping when she is enjoying herself and left wanting more