I can't speak to why turkeys don't gobble as much as they used to, but I believe it to be true. I do know beyond a doubt that we have more predators than ever, both nest predators and actual bird predators as well. When I was a kid and even as a young man, people possum hunted, coon hunted, trapped, etc. Hardly anyone does that now where I live or hunt. We didn't even have coyotes then, and very few bobcats. Now, we have lots of both, which, together with the nest predators,(include hogs), will insure that we never have a good population of turkeys in most of East Texas. We have plenty of Rios W of I 35 in most counties but they've been established for years. On a wet year there are enough hatchlings to make up for the predation I assume, although you can tell a difference in amounts of turkeys observed from one year to another. This is by no means scientific, just anecdotal observations from 18 years on a lease in Central Texas.