Right now I just have a bare dirt outside in the run. Does anyone disagree with putting down really small washed pea gravel 3/8 diameter? Or is this a bad idea and might have an effect on there feet later on down the road. I'm just trying to think of a more cleaner atmospere for them outside and would be easy to clean by sparying down with water hose every couple days if the rain hasn't already done so. Looking for suggestions or you can just say dirt.