On a bright fall morning in central Washington, a flock of sheep, the off-white of dirty snow, moves across an emerald field of timothy. To the flock’s west, Daniel Kinka and Cafer Tepeli scrutinize the sheep through binoculars. Somewhere to the east, obscured by the cloud of livestock, is Sonny.

I ask Kinka how Sonny is doing. Kinka, a Ph.D. candidate at…