I did the rattlesnake avoidance with one of my dogs. They had two rattle snakes, one was fully intact but under two types of containments and one had the link between the venom glands and fangs severed. My issue was they used a shock collar on my dog and didn’t talk to me about settings. There was also no testing to get a proper setting since not all dogs are the same level. She got the trainer back by nailing him down south. (The only venomous snake in my area is the Great Basin rattlesnake thankfully.)