Dogs and snakes, Cats and snakes etc...None of them mix. Its not a good idea period. If your dog is sleeping on the Floor and your holding him thats one thing.. but id never assume everything was ok and nothing would happen. If a snake latches onto a dogs nose that snake is going to get hurt in the end one way or another. Even if its a small dog it couls get stepped, shaken, flung... My rule is to keep all my pets separate and I never need to worry. My Burm was in another room with the door closed because he would nail the glass if a dog came up to the enclosure.