I was given a watering device from a friend that raises quail. He said he had some friends that have used this for chickens. We aren't sure how to get them to "see" the nipples on the bottom.
I switched mine and it took them a little while to get it about a week. My chicks are super friendly and will come look at any thing I tap on. I would tap it a bunch of times and let them come see it. Once one figures it out they will all get it. I left their old waterer in until I saw the majority of them using the nipple waterer. good luck.