These lil chickies were hatched New Years Day by Mama Butter. She is a Bantam Cochin, they are mixed standard chicks. They are together in a room in the house thats running at about 50 degrees (much warmer than outside - 10 at night, 30 by day) but colder than the balmy house. I want to move them to the garage where I have a 3x6 small hoop tractor with a heat lamp running at about 40 degrees. Mama has done very well so far with them - showing them eating, scratching and drinking. When she's hungry she does get of the nest to eat but hurries back once the "i'm freezing mama!!!" peeps start up. I think at the current temps they would be ok out there but worry will they be warm enough when a cold snap comes in February? Will she keep them warm at a few weeks old if its 20 below zero out (the garage is not insulated and the tractor is tarped)? Mama hen had been out in the coop until day 18 so I'm sure she'll be ok. Then, how long before they get introduced/reintroduced to the other 4 hens and roo? I have 14 chicks due in April - does it sound like these little chicks will be part of the flock by then (they'll be 3months)? Thanks for all your help - sorry for all the questions but this is our first Mama hen and they are all so sweet!