After our 2nd batch hatched at the end of this month, we had to make room in the brooder house for them. Which meant moving out the older chicks to the bigger coop outside. I hung two heat lamps, one red and one white bulb,, added a big waterer, a big feeder, and lots of hay! It has gotten to 27 degrees and they are doing just fine! One of my doors warped so my chicks could fall out the back if they aren’t careful so I just did a quick rig to keep that from happening. At least until we build a newer coop. I have two coops like this and a shed in the middle we used to keep our rabbits in, that is now the cool spot where the chickens like to sleep at night. So our next project is making it chicken friendly:) Once spring comes of course!