How terrible for you! There are just some things you can't be sure of, and one of them is the safety of your livestock chickens (or pet chickens) with so many predators lying in patient wait. It's all part of the cycle of life and we're all part of the food chain and unfortunately, there are some in wildlife that are just like people...they kill gratuitously and waste what they've harvested. It's unfortunate you couldn't grab the snake if you recognized it as one not harmful toward humans but golly, in the heat of an emotional situation the best thing to do is not endanger yourself. Thanks for the warning.