I have 4 incubators running 3 ducks, and 1 chicken.... I had 1 chick hatch about a month ago out of 30 eggs. The ducks have never hatched. They start and look good, in the incubator, and then they stop developing, and one chick I heard Chirping, when I took it off the turner and waited 4 days and no hatch, Broke it open, DEAD. The humidity is between 55-65, and temp is 99-101. And Ideas on what I am doing wrong and what I need to change. PLEASE HELP.