In Grafton, some residents work hard to discourage bears from entering their property by getting fierce dogs and putting up electric fences. Burrington, who kept up her mother’s sheep farming tradition, used a tractor to bury her dead animals deep in the ground. When the ground froze and she could no longer dig such graves, she drove the carcasses up an old county road to dump them around the back side of a rugged outcropping known as Aaron’s Ledge, where the bears were thick as trees.