Welcome to BYC. I’ve heard other BYC say that an electric fence/ wire is a necessity when you live in an area with bears. I keep my feed in a metal trash can with a very tight rubber type bungee cord attached from handle to handle. You could set up a game camera to see what your dealing with. However, better to be proactive & prepare for a bear. You can use the search forums for past discussions about predators & bears. Also, add your location to your profile & visit your state thread to find others who deal with the type of predators in your area.