I had a rotten egg explode under a broody hen once. Lost several eggs at day 17 because of that. Miraculously 3 still hatched (disproving the "everything must be sterile at all times" advice). After that I tried to smell the eggs carefully when the broody was off the nest. The other chickens must have wondered what on earth I was doing!I check the hen and her living conditions everyday. She knows what she is doing, and I don't want to disturb her for fear she will decide if I am that interested then I can just hatch them.![]()