How about skooch. (I'm not sure how to spell it
) It's kind of like an army crawl. If you use treat training, from a down you put a treat right in front of their nose and very slowly move it forward. Usually they'll raise their back end to move. If you can't move slowly enough to prevent it then sit on the floor with one leg out and your knee slightly bent. Move the treat under your leg and they have to stay low to get it. It took some time but Sadie does the cutest little skooch for about four feet.