Hi tntxdeb. No, a kingsnake will not kill your chickens from a bite. It is hard to tell from the picture- possibly chicken snake (rat snake), king snake or maybe even water moccasin (but I SERIOUSLY doubt the last). My guess would be that it is a chicken snake. But it would be worth it to me to pluck the chicken and check for a snake bite, just so I would know what I was dealing with. A venomous snake bite will be two puncture wounds with probably tissue damage around the wound. The NON-venomous snakes kill by constriction - squeezing the animal to death or at least until it passes out then swallowing it whole. But a constrictor could have scared your hen so bad that she died of a heat attack or shock or maybe she was just sick and a snake had nothing to do with it. I don't usually kill snakes unless that are venomous. I would NEVER EVER kill a king snake because they kill the other snakes, including the venomous snakes. Other snakes will not even stay around where king snakes are. I have had a huge snake population here at my house for over 25 years. There is a den where I have seen them come and go many, many times. This den has mainly generations of big old black, gray and mixed chicken snakes (rat snakes) but I have also seen garter snakes and a dang copper head coming and going (he was executed!). It is just the "community snake den". LOL Well, this spring I have not seen the snakes sunning at the entrance to the den like I always do in the spring, many times two chicken snakes at a time sunning. Well about a week ago I was cleaning out a big flower bed next to the den and a big snake crawled out of the leaves that I think is a king snake! Well yeehaw, IF it is a king snake he will move the rest of them out! I never would kill or move them in the past because I KNOW that if I move the chicken snakes out the copperheads will move in. The chicken snakes won't hurt anybody. They only make you hurt yourself! LOL I can't have copperheads living here. There is a zero tolerance on them! The snake I saw left the flower bed and went into the snake den and I so hope it was a prairie king snake! I found a skin yesterday at the entrance to the den. It was still damp so whoever was wearing it had just come out of it. I am going to take a good look at it today and try to determine what kind of snake it belonged to. I am so hoping king snake!!! I just really wonder how in the heck all these dang snakes find this den!!! Do they talk? lol Do they go by scent? I don't know but there is a bunch of them there! ...and it is in a very bad place. Family and friends have tried to get me to do away with it for years but I am afraid that will invite copperheads in and I can't stand the thought of somebody being bit by a copperhead! There are elderly as well as kids at my place and a copperhead bite could be fatal.