shouldnt really worry about this in kingsnakes. let it go for another week without eating, and try a live pinkie again.

i've had milksnakes and kings go off feed (even young ones) for a month or so at times. some can just be finicky eaters.

also, after waiting a week or so, try placing the snake in a brown paper lunch bag with a live pink and some bedding. the closeness of the pink usually induces the snake to feed.

good luck-Zach