the nipple will continue to release water as long as its pressed, in one of my pensI have 4 nipples watering 11 full grown full sized chickens with no problem.I've tried everything at this point. I just tried the nipples but they just don't dose enough water. My birds start to shut down and not eat after a day or so and go crazy when I add a bowl of water. They are using the nipple but only get one drop at a time which is not enough for a full grown chicken.