Funny you should post this. Tomorrow we are changing from shavings to fine play sand in our pens...probably what you folks call coops. They don't look like ya'll's "chicken houses" though! Very open and plain so the breeze can keep them cooled off.
Anyway...my daughter raked them completely out today and we are going to put down weed stop cloth followed by about 3 inches of sand. Ya'll know they will dig to China, so we have to put the cloth down to stop that, but at the same time water needs to be able to flow through if it should rain in some...or someone spills some of the water inside.
We were just discussing how to clean out the poop today. I'm going to get a shavings fork and wire some metal screening material onto it. HOpe it works. Wish I could get a snow shovel down here and drill holes. That sounds like a great idea!