I had to leave town for 2 days right after x-mas for an emergency. My house got cold, I thought I lost my after x-mas-before New Years batch hatch, but one did hatch.
I still have eggs due to hatch on the 16, and some on the 20th
While I was out of town some of the eggs I picked up were barnyard mix from 3 hrs away, (one way) so fresh blood for the coop.(mostly the tan ones.)
These guys are doing great. And my roo is working!