They have found that small strobe lights mounted along fence lines work reasonably well. The lights are solar powered and free to ranchers... Oddly the ranchers that keep having run ins with wolf packs activity refuse to use any deterrents whatsoever. It would appear, here in Washington, that the ranchers don't care about their livestock at all, they actively refuse to protect them until there are issues then they get the state to spend a $100k on a helicopter based hunt. They won't take any free help, not employer range riders, very irresponsible.
At this one the ranchers using public lands are nothing but a lazy welfare case from my point of view.