Garter snakes won't hurt you. Snakes don't scare me, but I know I'm really not normal. You might try putting a bucket over the snake and then slide a piece of cardboard underneath it, like catching a bug in the house or something. Then take the snake to safety.
I went and checked, snake was gone, no carcass pieces anywheres. I am thinking the snake skeedaddled right outta there once it realized where it had slitthered too, as he probably was thinking that there weren't chickens there a few weeks ago.
hopefully he wised up and won't come back.
I was thinking of getting the neighbors boy, he likes to collect frogs, so would have been easy for him.