Hello BYC! I was wondering if anybody could tell me if my eggs are fertile. This is my first time hatching eggs in an incubator and these eggs are 4 days old. Im not sure how to tell if theres an airsack and everything. Please help! Thanks!
Try candling from the other end - shine the light from the top down through the big end of the egg. You should be able to see the air cell that way, and possibly see any development.
It's early though, so you might wait until day 7.