A golden eagle crouched against a band of rocks that abuts a cattle pen in the Gila National Forest catches the eye first, causing a pause to look for what’s brought the bird to the ground. The eagle doesn’t linger, disappearing rapidly amid the tops of ponderosas. On the far side of the cowpie-strewn basin, a reddish brown hulk has been draped over a downed tree. Once close enough to see that the cow’s hindquarters have been severed and its bare hip socket writhes with insects, the stench hits. From uphill and upwind, a game trail threading off into the woods appears.