Mandelyn, if you haven't built your coop yet and want to have water inside of it, you can frame a section of floor and directly install hardware cloth to it so the water drains away straight to the ground below. No try needed to be dumped. We don't offer water in the night time shelters for adults. They have it outside only to keep the mess to a minimum.Cool idea using the drawer! I hadn't thought of that with mine. It's wood framed.
That should transition to the coop too later on. OOOoo! Design the coop to have a flap on the bottom for external access to the indoor water drawer! No moving shavings out of the way to get it!