In the early 80's I had a GSP snake broke, as I was told. I had it done at a FT where a guy was there with a defanged rattler and an ecollar that had one setting on it in those days, which was HOT. He led my dog up to the snake, and when it struck my dog he burned her at the same time. She jumped straight in the air and yelped, he said the dog believes the snake burned her and will leave em alone now if she smells em before stepping on one. He then said that will be $75.00 thank you very much. I was a young E5 in the Navy then with a family, and $75.00 was a lot of money to me in those days so I was happy and convinced that my dog would never get bit becuase of the amount I spent. I eventually sold her and heard later she died of a snake bite.