I live on a MT. with bears in the yard all the time. Bird feeders and deer corn feeders have been gone a long time and they still come back. The only thing that I found that works is an electic fence for a while. My main antiibear that works are throw rocks at them or shoot them with a rubber bullet in the ass from a 12gauge shotgun, that works the best. Here in WV any bear threatening livestock can be shot dead! Check with your local DNR office.