Over the years we've tried a variety of things to deter theft. Thieves are generally lazy and look for the easiest score so any type of determent helps. Setting a few round bales in gateways and in front of doors helps. Most of our tractors have quick disconnects on the batteries for easy removal. Game cameras have never led to a conviction but did alllow us to recognize the thieves. Once we had a neighbor, would sneak on the property to hunt a little, didn't mind really but he shoulda ask first. The hot wire accidentally got laid against the gate and I never found it open again.
Son had a bunch of steers he was grain feeding, they would come running whenever someone stopped at the gate, neighbor said he saw someone climbing the gate once but a bunch of chowhound steers changed his mind.
Gotta be inventive.
I hate a thief.