I didn't see Bob's info on this,...but I took my pooch many moons ago to Magma Birddogs, in Arizona, where I'm based.
There are more than a few outfits that do the "snake-breaking" thing.
Magma sold to new owners a couple years ago,...Matt & Candi Sutter. I have no idea how well they have continued Magma's great reputation, but they can be contacted at 623-826-4323.
https://www.snakeavoidancesutteraz.com
As previously described by someone else here, my dog was trained using a shock collar in much the same way. 2 diamondback rattlers were covered with overturned 5 gallon buckets. After one bucket was lifted, I was given a long-lead leash and instructed to lead my pooch toward it and let her get curious and approach it, getting a good whiff. The instructor had a remote for the shock collar and carefully observed how close the dog got to the coiled and buzzing snake. When she was sure the curious canine was close enough to see the snake and smell it, but still out of striking range,...she zapped her. My poor puppy leaped about 4 feet in the air with a loud yelp,...and ran over to me scared and confused.
We put the bucket back over the coiled snake and I spent a few moments consoling my dog and calming her down. After a few minutes walking her around, the instructer lifted bucket #2 revealing another buzzworm. I was told to attempt to lead my doggie toward the second snake,...but she wasn't having any of it. In the dog's mind, the snake had somehow zapped her and caused the pain,...so she refused to go anywhere near it. She literaly hid behind me and sat her butt down refusing to move.
Mission accomplished.
Back then, nearly 10 years ago, Magma Birddogs had as part of the purchase price for the training session (which was $100 then) the right to bring your dog back again up to a year later for a free re-test,...to see if the training had stuck. I brought mine back for the re-test, and she certainly DID remember. When I tried to lead her back to the coiled snake,...my doggie was all full of NOPE!!