Im between the mats and sand but urine gets into the pores of the rubber, between and underneath them and the stench is hard to get out with rubber mats. Mold will also grow under them so when you lift them to clean you have a mess right? If you still have to buy bedding it may not be as economical as permanent sand dont you think?

P8ntcrazy the sand sounds encouraging ! Im wondering if the stall skins would make it any better or not... probably not if its really deep. Any sources for reject sand? Did you ever have sand colic problems?
maria