I think that binka_nugget gave some great advice. I will also have to try this with Prince, as he is still learning 'stay'.

Otis will not lay on any hard floors either. Otis does know a few tricks that he enjoys very much, but he will only do it on carpet. (Sit, down, crawl) Sometimes he just does it for fun, and sometimes he won't do it on command. It really depends on his mood. Gotta love him though!