Today was Day 12 for 11 of my eggs and Day 11 for 2 of the eggs. Since my broody had gone off the nest on Day 5 for 3 hrs, I decided to candle the eggs tonight. All 13 have developed but I could not find a well defined air sac in one (well its a chocolate colored egg so no wonder I can't see well) and another one seems a little behind for Day 12.
Is it safe to candle one more time on Day 18? Also right now she is in a dog cage in the coop. I was planning to move her to another coop close to hatch. Is that a bad idea? Shall I wait till the chicks hatch and just some cardboard all around the cage so chicks don't wander out?