I believe it is possible, yes Sheree. It has been done not only with dogs, but with rats, bunnies, as you most likely know.. hehe mice, and other pet rodents. Also true with birds, I don't see it being that much different with snakes. Yes, each species does tend to have a temperament that is common to the species, but there are exceptions, and I can see animals with a lower prey drive/defense instinct being bred to make more docile animals.