Great idea! The chickens will even love to spread it all for you.Maybe you could add more dry material to the run? Whenever mine is getting too wet I add some dirt (i keep some in a barrel under the porch to keep it dry, but bagged dirt from home depot would work), some sand, some dry pine shavings, some wood chips, some dirty shavings from the coop.....just more stuff in general, then I mix it all around. Always seems to fix the problem for me.