I was conversing with another BYC user about what I do with my flock in the winter. I normally use a heat lamp and water heater to keep them and their water warm. They told me that a heat lamp was a fire hazard and it wasn't good for them to get used to the heat in case the power went out in the winter. They said that they never use a heater for their flock and all was well. So, I've tried going this far without it. At night it's been getting down to 10 degrees or so. I've tried to do what they said, and avoid using the heat lamp, but over the past two weeks I've lost two chickens from the cold. What should I do? I don't want to lose any more of my girls.