Nipple waterers are at least a partial solution to the water access issue. I’m jumping around on the thread so forgive me if somebody suggested this already….I do have pics for SHRA…It's really hard. Locking up the feed is not a big deal. The other problem lies in that the chooks are out most of the day while I keep a eye on them, their coop is on the other side of the yard, and their water is freely accessible, and I don't know of anything to keep the sparrows out of it.