Robinson,
You're lucky to have a dog that reacts to snakes that way. Many many dogs do not, and get injured or killed because of their reactions. They'll stick their noses in for a closer look and get bitten on the nose.
I've heard of people putting shock collars on their dog and placing a plastic snake on the floor in front of the dog. When the dog goes in for an inspection, the shock tells him that he shouldn't be investigating the creature.
For those with snakes and dogs, probably a smart tactic.
