My own personal conspiracy theory is that the aerial spraying by DARPA is responsible for the decimated mule deer, pronghorn, forest grouse, and sage hen populations. It may be from another source of poison but it's definitely the result of large scale poisoning. I have no evidence for this other than watching the eastward creep of these animal populations. In the late 1980s and early 1990s there were grand populations of all of these animals in the entire state. Great mule deer numbers could be found in very northern Idaho, along the Snake and Salmon rivers around Lewiston, and across the breadth of Southern Idaho. Pronghorn populations were in the thousands from Boise to Island Park and from Salmon to the Owyhees. Sage hens were very abundant all across southern Idaho and it was a favorite September activity in Northern Idaho to drive the forest roads and shoot Blue and Ruffed grouse. Within the next 10 to 15 years, all of these populations, from Idaho's forested northern border to its southern border with Utah and Nevada and from Oregon to Wyoming, were destroyed. Montana and Wyoming's populations of these animals held out for an additional 5 to 10 years but now their wildlife populations are being destroyed, from west to east. Elk, whitetails, and moose seem to be fairly immune from whatever poison has been distributed so they planted wolves to decimate those populations.
Lots of folks on here will probably say that I'm an idiot or a fool for saying this, but I'm from northern Idaho and live in south eastern Idaho and I have no other way to explain how the alpine mule deer herds in Boundary County and the Salmon River mule deer herds in Central Idaho and the desert mule deer herds in southern Idaho all tanked in the mid 1990's. I hunted pronghorns north of the Salmon River in the late 1980's where they no longer exist. I've lived in and hunted pretty much everywhere in Idaho over the past 40 years except very southwestern Idaho and watched it happen. The landscape looks pretty much the same now as it did 40 years ago, but these animal populations are all but gone.