One of my runs is pretty small (12x12) and during the winter everything was fine cause the ground was frozen, but a few weeks ago everything thawed and now the ground is a poop, wet, muddy, smelly mess. Due to lots of outdoor projects because of having warm weather, i let the birds out to free range a lot right now, but i would like to not gag when i go near the run and to not object the idea of letting the birds in there. so, now to my question...how do i clean it? will liming it take away the smell or not? can i lie it then have the birds right on it? thanks