Cattle growers can use a roughly 48-square-mile swath of the Gros Ventre Range this summer that was retired from sheep grazing a decade ago, and rangeland watchdogs are raising questions about the process federal land managers used to authorize the restocking. Controversy over the Bridger-Teton National Forest’s decision to temporarily allow cattle stocking in four allotments known collectively as the Elk Ridge complex is heightened by a 2016 vo…