In case of Zombie apocalypse i would want australorps. They have not even blinked with their egg production this winter. Their only risk factor is they would probably be friendly to zombies too.
I am really excited for your hatch feyraine!
HaHa -- maybe some of the brown eggs from you are Australorp X eggs (is that a possibility?)
In the NYD HAL Bator -- Last night there were 16eggs that I saw movement in, there are 14 more but those were too dark or just didn't happen to be active when I looked.
My vote for most likely to evade Zombies is actually the SFH, they never walk from place to place, they always run in a hip hop zig zag , I think they are practicing ;>