It looks like the egg is still developing! Unfortunately, we have discovered that Black, Gold and Knight are definitely roosters. That means we need to sell them or kill them soon. My dad had some...unique suggestions for how to kill them which I would prefer to leave unwritten. I put an ad in Backyard Chickens (Chicks and Chickens-buy sell trade) but no real responses yet.
I have a bit of good news, too. I now have pictures which are inspiring enough to make into a ChickenTales adventure!