I've had one or two of these little guys, bred a few too.
I'd say about 70% of the babies, right out of the egg mind you, will first poop on you, then bite, then try to rub the poop in the bite.
It's just the way they are.
However, with regular handling and feeding, they calm down to one of the best snakes you'll ever have.
The only drawback to CalKings is the attitude of some of the babies.