I found a black rat snake behind my nesting box last week, he was at least 5 ft long and he is no longer bothering the chickens. This week, I had 3 eggs disappear yesterday - and two eggs disappeared today. I wouldn't be too worried, but I'm saving my Marans eggs to incubate! My chickens are not harmed, and show no sign of distress. My coop is built very secure, (metal roof and siding, concrete floor, concrete footer around run, ect.) there is no way for any predator bigger than the size of chicken wire holes to get into the coop. I presume I have another snake problem, but I'd like to know which possible predators I could be dealing with. In addition, what are some ways to deal with a sneaky snake or otherwise predator without harming my chickens. I've heard about using ceramic eggs, will that work?