Weather, and nest predators are your largest factors in hens dying and poult recruitment. Been raising turkeys only 3 years and it amazes me we have any at all. Hardest thing other than my kids I've ever tried to raise. Getting eggs to hatch and the bird to 8 weeks old is very hard. When my hens are setting I keep a gun within arm reach at night, 3-5 nights a week dog will bark and I have to get up and kill something eating eggs or killing poults.