I live in Salt Lake City Utah and I just got some backyard chickens this year and they have done great all summer. They are now about 6 months old and it is starting to get cooler outside. I am worried about this winter. I was advised by the woman I got the chicken from that they will not need a heat lamp or any heating devise (except for a heater for their water). Is this true???? Or do they need a heat lamp??? I have 5 chickens, austrolop, ameracauna, brahma, black star sex link, and a delaware and they have a 4 foot by 4 foot chicken coop that they can go in and out of all night, and there are two vents in it. I am also planning to move somewhere further east where it gets even colder than Salt Lake and so I didn't know if it would be bad to get them used to a heat lamp and then if the power went out one night and they weren't used to the weather, that they could freeze. Maybe it is best to let them get used to the cold, I don't know. Any suggestions???