There's the it's UPS driver again bark (level 1), the hunters are crossing our land again bark (level 2), there's the I'm not sure what's up bark(level 3), and there's really something going on here get your gun and let me loose now bark(level 4).
Operator training is critical.
“The trash man is stealing our stuff!”
Defcon 4.
:D
yep. Our 90 lb Lab is a chief of security. His radar scan range is ~ 1/2 mile - anything that moves gets a gimlet eye. Anything approaches the fence gets a charge. Any predator that comes over the fence (coyote, bear) gets chased off the property. However, he leaves the deer alone and is properly respectful of the elk. Any non-family humans mean that we better get a hand on him before they get out of their vehicle.
Works for me. Only issue is that we have to spell C-O-Y-O-T-E or he drives them off before I can get the rifle off the pegs.