+R Do you avoid rattlesnakes?

Does anyone have anecdotes about their +R rattlesnake avoidance classes? I previously used a shock collar for rattlesnake avoidance with my last dog, which worked but made him intensely fearful of snakes. He would alert me to snakes for the rest of his life but was very jumpy and once hurt himself mistaking a stick for a rattler.

My current dog, an anxious Australian Cattle Dog mix, has only had positive reinforcement training. I’m hesitant to use a shock collar with him due to his anxiety. I’m considering +R rattlesnake avoidance but am unsure about its effectiveness and whether it needs yearly refreshers. Has anyone had experience with this method?

Depends on the breed and their prey drive. My hunting dogs need yearly reminders.