Thanks every one for the input. On LoneOaks' advice I removed the old waterers yesterday. This evening I noticed one of the roosters pecking at a nipple. Maybe tomorrow they will they all will. If this works, it will be a much cleaner drink of water for all the birds. I have 20 two week old...
How do you get old chickens to use a new watering system? We just installed low pressure push in style water nipples in a pvc pipe. They just don't get it.