i have 8 hcickens. thier coop, is a dog pen! we have covered the top of it with fence so no predators can get in. they are shaded from the sun by various trees. they have the option to sleep in 2 coops(both the same) and are protected by rain in the coops. However, the ground of thier cage is cement tiles (they wont stay in the coops all day because there is not enough room, they only sleep in them).recently when i visited, it had rained and the ground was matted with a mixture of moldy corn( they get in thier food bowl and kick it alll around), and feces that gave off a disgusting moldy smell. when the rain got to it, it wan unbearable!! we are going to build a real chicken coop to put in thier cage and they will have room i it to move around in. The real problem is, what should i do to the ground of the cage? put hay in it? plant grass? take out the tiles? im worried that in these conditions they could get cocci! can someone please help?!?!?!