I am ready to put the 15 yds of sand into the runs and the thought crossed my mind. Are you SURE? So everyone who has put sand in the coop or run.... Please let me know if you didn't like it. And why. I know alot of people have said such great things, but if there are any negatives about it I would like to know before I put it in. Actually should have posted before I worked all day digging out 6 inches of *@!*# I won't be able to move tomorrow and I wrenched my thumb and it HURTS! But it is ready...! Oh gosh the smell was awful. There was a pig pen there about 10 years ago and chicken and pig poo are not a good combination.