I think a refrigerated fertile egg remains viable until the embryo has started to develop. Once the embryo starts to grow it must remain near 95.5* - You cannot refrigerator the embryo or it dies.
I don't know what the breeds are. We have one from TJ's. It was a white egg and a pale yellow chick.
From 4-H we have 2 black chicks that came from dark brown eggs & 2 that look like chipmunks and came from green eggs.
There are 14 that range from a pale yellow to a golden reddish color - 8 of...
My 5th grade son wanted to hatch chicks for a science project. He needed a Hypothesis so we came up with; "Refrigeration of fertile chicken eggs will decrease but not eliminate the viability of fertile eggs". We then got 2 dozen eggs from the 4H, 1 dozen from Trader Joe's, and 1 dozen from...