I'm going to side with my fellows Texans and vote to kill it. Just like we killed one nearly identical to it last summer after I stuck my head in the coop and came face to face with that 6 ft bad boy, nearly making me keel over with a heart attack...
I dang sure know that one less snake isn't going to be detrimental to nature and tip the scales such that the world becomes overrun by rodents.
Any predator that comes around in hunt of a chicken dinner gets shot. That includes opossums, raccoons, skunks, and the poor little stray dog that came around our house 2 days ago. And lest you all think we're heartless gun fanatics down here, I'll just have you know that I personally cried buckets of tears over that stupid stray dog. But we tried to relocate, he came back, and it had to be done. Why the heck would I want to relocate a snake that would just be a pest for someone else to have to deal with?
As for mice and rats and other snakes, I'll leave it up to the granddaddy red tailed hawk that lives in our pasture to take care of those. He's old and huge and walks behind our tractor when we bush hog and grabs whatever jumps out. Has never once bothered our chickens, ducks, or baby geese. Now HE is a MAjESTIC creature. I just don't get using the term majestic to describe a rat snake...