Bird dogs are usually interested in chasing anything that moves, which can include rattlesnakes. The first sequence shows a dog who hears, smells, sees, and then tries to chase a rattlesnake which has been defanged for use in this specialized training. The dog suffered no pain, as there were no fangs in the snake and, after being bit, he went right back to trying to chase it again, so the bite itself is not a future deterrent.
The second sequence shows a dog being trained to avoid snakes. The tape flags mark an e-collar around the dog’s neck, as they train multiple dogs at the same time during these sessions. The dog is corrected when he clearly hears, smells and sees the snake. Usually this process takes just 1-2 corrections and they won’t even look at a snake again (and will avoid one if they hear or smell it), as shown in the third photo where the handler is trying to get this Brittany to walk near the snake, but he wants nothing to do with it.
