I'm not going to claim to be an expert on kings, I've only got two one of which is just a baby. However, I've found with my big king that if I feed him one weaned rat on the same schedule as my corns (3-4 days) it keeps him very happy and his growth rate is pretty good. He's never been particularly aggressive except when it comes to food lol. If he even thinks he smells a rat or a mouse he will bite. I don't know if what I am doing is the absolute "correct" way but it works for my particular snake and according to everything I've read on them it is the right thing to be doing. Good luck with your guy!