Thank goodness for your post! I also live in North Texas and am having a terrible time this year with black chicken snakes killing my hens. I have been on a mission the past week to get to the bottom of the killing after the loss of my favorite full grown Ameraucana. She was the 4th death in 10 days and I am beginning to freak out. I literally hear little chicken chirps everywhere I go. Tonight, my stressed senses paid out, when I heard a slight bump and then little chicken chirps. It wasn't even enough to get the dogs to stir, but I got out of bed, grabbed my heavy duty flash light and went to inspect the little chicks that I have in my backyard. When I got outside, two of my little chicks where running up and down the fence line making a fuss. They are Ameraucana, about 8 weeks old, and because they don't see well, they are always the first two of the now 9 to settle in at night. So seeing them on the ground was concerning. I entered the fence and they ran circles around my feet making it difficult to walk in further. When I sat the flash light down to pick one up, I noticed my sweet Buff Orpington laying on the ground about 3 feet away, like she had fallen out of the tree and broke her neck. I immediately grabbed the light and jumped over the two squawking chicks to check on her. I leaned down to inspect the lifeless chick and was having a hard time making out her form, when I say her body move to reveal the head of a black chicken snake. I was so worked up after days of waking up to dead chickens that I instinctively started beating the snake's head with my flash light. I was sure the chick was dead, but still could not imagine striking her. Which means I was pretty dang close to the snake and the chick to get about 4 pretty good whacks in. The snake uncurled itself and took off to hide under a near by water tote. And would you believe, my precious little chick jumped up and ran over to her sisters, which were now behind me back near the fence.
I made a half effort to chase the snake, but only armed with a flash light, decided to devote my attention to the chicks. I inspected the Buff and thankfully she appeared to be fine, so I sat her on a nearby perch and went to put one of the Ameraucana's back in the tree that all 9 hens started roosting in when the first chicken was killed. And let me say, she was having none of it. She let out a screech and flew back down to the ground by the fence. Usually, I can put them in the tree when they are jockeying for perch position at sunset. So instead of upsetting her again, I grabbed up all three of the little ones and brought them inside for the night. The remaining chicks, 2 - 8 week olds and 4 - 10 week olds are still in the tree. My question is, did the snake climb the tree to get the chicks? I know that may sound crazy, but one of the other chicks was killed when it "fell" out of the tree, after I had made sure they were all settled in for the night. I would have said it was a cat that got the chick, except whatever killed her, left her. And I have seen the chicken snakes in the hen house go up a 4 foot wall to escape in nothing flat. I believe the snake is getting the chicks by knocking them out of the tree. Has anyone ever heard of that?