Just make sure that when they are together, you are watching them. You can tell when a kingsnake is seeing the other one as food as opposed to a mate. I noticed my male cali king, who doesn't see my female king who's half cali, as anything but a meal, will deilberately start looking for her head in a rather aggressive manner, paying no attention to the rest of the snake and being sure not to touch her at all. (they like to grab other snakes by the head). My other male king, who bred my female this year, was different in his approach. He climbed on top of her back and rode around on her and got himself into position, and only when he was completely on her would he grab her by the neck. And when they grab the femae during mating, they don't try and wrap around them, or chew onto them. They just hold steady and keep twitching, and trying to entwine the tails. It still looks rather mean, but it's nothing like when a kingsnake is trying to eat another snake. You will know that your female is receptive if, upon him biting her neck and pushing his tail against hers, she will deliberately arch her tail into the air to make it easier for the male to connect. If she doesn't do that, and instead is flipping out and frantically pulling her tail away, she is not receptive, and NOT happy... haha