They do real poorly if not treated. Of course the best remedy is prevention, which is where Glen Seal comes in. He's been training dogs all his life and working with his own dogs on snake avoidance since 1965. Seal started the training because his hunting dogs occasionally encountered rattlesnakes. After all those years, Seal feels he's pretty much perfected his technique.
Seal defangs the training snakes so the dog never comes into harm's way.
He trains dogs to be wary with all of their senses. The first time a dog comes near the training snake, Seal silences the rattle so that, coming from downwind, the dog first smells the reptile. And when the pooch practically steps on the rattler, Seal jolts the dog. For round two, the snake rattles, so that sound becomes another warning signal. Round one is enough for Shelby.