I know its fround upon but broke down in put heat lamps in the coops. I used to have one coop with them all, but I built another much bigger one right before Christmas and I fear the six chickens and the turkey just have to much space in there to keep warm. Same with the original coop with only the five adults and four youngin left there.
Its a personal decision..you have to decide what you think is best for your flock ...
Im curious why did you split them this time of year ?
I put my 2 flocks together ...for heat in the winter ( young ones & old ones )