I recently built a nipple drinker system, 4 nipples on a length of pvc pipe with a 5 gallon container feeding it. The idea was to have something that they wouldn't kick dirt into and reduce the need to keep refilling it. The only one they don't kick full of dirt is the one that is hanging next to their feeder and is a few inches off the ground.
I've not seen them even try using it so I've picked a few up and tapped their beaks against the nipples so they get water and they'll drink when I do that, but they otherwise don't use them.
I don't want to remove the other drinker as they'd have no access to water unless they get used to using the new drinker.
Any ideas?