you'd think the dogs would be enough of a predator to be able to escape, at least to hurt the snake enough to make it release. I saw a video the other day where a cougar killed a HUGE python, just because it was in the same general area as it's cubs. The python got to the water, the cougar just went in after it and pulled it out again and finished it off.
https://youtube.com/watch?v=DJmP_MBuD7w