i've had the misfortune of being visited by 5 chicken snakes so far this year. the first one, i threw out with a sharp=shooter shovel, through the external doors on my egg boxes. the next 4 i shot with a ruger bearcat with .22 bird shot. my pen is 16'x20' with half galvanized tin walls and roof, the rest is chicken wire with 26 gauge roofing steel laid on it's side [ 37'' high ] all the way around, except for a 10' section in the front where the entrance door is. i installed 1/2 hardware cloth over this, and the door, and there is absolutely not any way even a mouse can get in with the door closed. since it's gotten so hot, i let the girls out every day in the morning, and leave the door propped open during the day, so they can go back inside and lay. this HAS to be how the snakes are getting in, through the open door, during the day. i have 10 pressure treated egg boxes, approx. 3' high, with external egg-gathering doors on the outside. open a door,, and there a chicken snake is,, laying up in the egg box. i'm not fooling with them any more,, if i find one in my egg boxes,,, he is a shot snake. i have a cat to take care of rats and mice, and as i live in the country, there will be plenty of them everywhere, snakes or not. i watched my chickens pecking at something saturday and walked over, it was a 12'' copperhead, and i whacked it with a stick---but--- this means a batch has just hatched out somewhere beside my yard, after reading this thread i will get 4-5 of the minnow traps and lay them around. i don't quite get the concept of baiting those with eggs, as a small copperhead can't eat the egg anyway,,, can they????