What about this? A 5 gallon bucket with horizontal nipples, a birdbath heater with a rated wattage for your climate and a small submersible fountain pump to circulate the water in the bucket and keep the nipples flowing. Pump may run continuously or hook both pump and heater or heaters to a...
Been readin BYC for a few years and have a brainful of plans and ideas. Will try to post pics of our startup. BYC is an excellent site for all aspects of chicken raising!