What percentage of hens are laying eggs? What percentage of those eggs are viable? And, have those numbers changed at all over time? While predation and habitat is looked at, I think we need to see if there is a problem with that leg of the stool. Turkeys explode in some suburban areas and end up nesting under benches and other terrible nesting sites. Those areas are loaded with feral cats, possums, and coons. Yet, turkeys somehow still become a nuisance animal in some places. I think the disease aspect needs to be looked at more closely, both from how it may kill turkeys, to how it can affect fertility.