5 days ago I installed chicken waterer nipples in the bottom of a 5 gallon bucket. I have 7 chickens that are about 1 year old. I watched them for a while and they didn't do anything to the nipples. Over the last few days I have taken at least three different chickens beaks and pushed them up against the nipples. After I do that, that chicken will drink along with one or two others for about 5 minutes and then they stop. It also looked like the water level wasn't going down very fast proving that they weren't drinking as much water. My egg count dropped from 5 or 6 a day to 2 or 3 a day and so I put their old waterer back in and they went crazy. I know lots of people on this site love the nipple waterers, but how do I get my chickens to use them?