Basically everything El-Ziggy said. MBKs are great eaters and mine has never skipped a meal. They don't seem to get nearly as nervous as ball pythons do, but you've gotta remember that hatchling kings are really small. Even the smallest mini hide RB sells is a going to be bigger than them.
Personally, I started mine in a 6qt tub with aspen substrate, 2 hides, and a water bowl. I moved up to a 15qt when it hit 100g and then up to a 28qt tub now that it's nearly 200g. Currently, King's favorite hide is a hollowed out piece of wood that's just a bit larger than a cardboard toilet paper roll. He barely fits in it and he loves it. I have a few bigger hides in there, but that's where I see him the most.
As long as she can't get out you should be okay, but I would definitely put her in something smaller.
Anyway, congrats! They're gorgeous snakes.![]()