I have been thinking about getting ready for winter - esp. when we suddenly went from 70's down to 50's. I am thinking about making the cookie tin heater for the water - even though I only needed the water heated for a month last year as we don't get that many really cold days in NJ. However, I was thinking maybe we get overboard with this. In the old days they didn't have heat in the house (except fireplaces) let alone worry about chicken coops being warm. Are we (modern chicken pet owners) overdoing this? I'm sure some chickens froze in the midwest and north during extreme weather but they must be hardy little things?