A snake, no matter what kind, would have a heck of hard time biting a chicken.  So, throwing that snake in with the chickens was okay, in my humble opinion.   Talking about entertainment, have you ever seen a chicken go after a mouse?   Chickens like to kill mice, too.
I wish mine would kill our mouse population before the snakes come slithering in.  I really could care less for snakes and to keep a copperhead in a cage, is in my opinion, CRAZY.  But I have a fear of snakes.  I won't run from one if I see it.  I will do what I can to kill it.  In my yard one woulnd't have to go far to find a weapon.  Bricks, Boards, rocks and there is usually some kind of yard tool around somewhere.  And with dogs it wouldn't go far.  I would call the dogs and they would hold it at bay so I coud go and get someting.
About 11 years ago my husband dragged the garbage cans from the curb to where they belong and under them where a bunch of Black Racers all couled up together.  It startled him and he came in to tell me about it.  I calmly got up and went outside and got on the riding mower and fired it up and kindly took a stroll to where they where and proceeded to make snake burger out of the bunch.  He just stood there and laughed at me.
If I know its there, it has to go. Once we had  a chicken snake in our house and it had to be there about 3 days before it was found.  It was over 6' long and stuck in the window airconditioner cover trying to get out.  My husband told me to grab its tail and pull it out.  Yeah, hes crazy.  I've never toutched a snake in my life and never plan to.  I went to get the limg trimmers and he cut off its head and outside it went.  I moved a week later.