Grizzly bear euthanized after cattle killed near Avon AVON – Wildlife officials euthanized a male grizzly bear on May 24 in the Ophir Creek area northeast of Avon. Montana Fish, Wildlife & Parks wildlife specialists said the bear had been in the area consistently for the past month and killed several cows on a local ranch earlier this week. The most recent cattle depredation was confirmed on May 23, and USDA Wildlife Services crews set traps on the site that evening. The U.S. Fish and Wildlife Service made the decision to have the bear euthanized due to its history of cattle depredations and persistence in staying near livestock.