I need help!! We have purchased a house in Clovis, New Mexico and the previous owners are leaving their chicken coop complete with 8 chickens. We are moving in on Nov. 1st and I know nothing about chickens. They have a covered run and coop (covered because of the hawks I am told). They say just to feed them mash & water. I don't know how old they are, but am I supposed to graduate to crumbles or pellets or something? Also, how cold does it have to get before you put a heater in the coop, or do you need a heater at all. Any tips or help would be great, I don't know what kind of chickens they are. Thanks!!