Something simple like the light is what I had in mind. I am somewhat afraid of anything that might start a fire.... I have tons of dust accumulate on surfaces in the coop. I was looking for something maybe with a gentle spread out heat like a heating pad. Problem with a heating pad might be the chickens knawing on the power cord (although I can think of solutinns for that). Or, if the waterer leaked and shorted out the pad (which is why I thought about maybe a waterbed heater... plus they are thermostatically controlled). Not sure where all the dust comes from... I use wood pellets (horse bedding) with straw on top, but I am constantly haviing to dust off surfaces.

I have a dog waterer dish that stays thawed and it has a spring around the power cord to prevent chewing damage, but with the big opening the chickens would fill it full of crud really fast. Maybe I could make a cover for a water dish similar to the feeders that keeps them from climbing on it .... just thoughts.