I have had about a 60% hatch rate in the past and as well during my first hatch this year. After the first incubation was successful we set three incubators, the first with 36 eggs and the other two with 40. We set the first one yesterday and 29 eggs were dead. We then candled the second incubator and about 20 we took out and we kept about 15 that are "possibly" alive in there. Our third one is two young to notice veins in any of the eggs. What on earth could have happened! We use automatic turners that all work, we kept the humidity up. We have done everything the same. Any ideas?