I've had chickens for over 15 years. It's a very well diversified flock. I've never allowed our hens to hatch due to my family's schedule. Well we had a hen show up with 8 babies on November 4th of 2018. Winter is upon us in the north east of the USA. So we've had them all inside since then. Babies are doing great have 2 roosters for sure, lol. We don't heat our coop, have 30+ chickens and ducks together. Just use a heating lamp for waterer when the days get and stay below freezing. Now onto my main question..Mama was a picked on hen that's been very territorial prior to babies. When can I remove the Mama from her babies permanently so she can go back outside? Babies will remain inside through the winter as they won't survive our winter predators, and weather. The babies will go outside late March early April once I know they've bulked up to survive cold snaps. TIA for all the help.