Wow! What an amazing coop! Also your goats are adorable, I really, really want some goats- but have to wait until we move somewhere with a bit more space. Great job!
Really nicely done! For the poop deck, we used the heavy plastic that is wrapped around dog food when it is shipped. You can get it for free at any pet supply place like Pet Supermarket, when they get a new shipment of dog food in. We love it - we cut them to shape and just pull them off, and dump the poop in the compost and put it back up - 2 minutes tops.
Here is a picture one day 1 - before they roosted.
And here is a partial (taken to show how my goofy chickens roost) and to show you that my chickens really do poop