So we have a small 3 chicken set up in our yard. The girls have enough room and are generally happy. We let them out of their coop/run whenever we can. However, when it rains we don't let them out and the bottom of there enclosed run is a wet, muddy stinky mess! I have seen that some people use sand in there coop but I just want to check, do you think if I put sand in the run would it be drier? The run is covered but small. We have play sand and some construction sand laying around and I am thinking that if I put it in their run that it might help but I am not sure if it would cause any problems. Thanks!