I have put 3X5 rubber mats in my horse stall. Have just a clay floor underneath. Does anyone have trouble with the urine going thru the cracks and making the clay floor yucky underneath. I fold the mats back every few days (a not so easy back breaking task for a girl) and sprinkle liberally with stall dry. This stall is 10X20 and used by 2 horses as a run in. They come and go as they please but use the stall as their litter box. (Guess I dont blame them). I use pine shavings as base bedding then spread straw on top. Am I doing something wrong ? Thanks for any advice