Last winter I used EVA foam mats and a small amount of shavings to soak up the wet. While it generally worked, I could not get rid of the smell of urine no matter how often I scrubbed the stable. As soon as she peed, the smell came back. And hosing out that often is not practical. This summer and winter I have had at least one of the ponies in all the time. I've got rid of the mats and am now using recycled wood chip. I did start with shavings but the wood chip is cheaper and I think it's nicer too. I won't use straw as both ponies will eat it and it takes ages to compost down. I deep litter the stable and poo pick twice a day and dig out the wettest patch once a week. The smell has virtually gone now, so less complaints from my horse-hating hubby.