I'm just wondering if the mice are enough. Boa's grow pretty quickly and I know when we raised Severus he went from mice to needing the bulk of rats pretty quickly. I'm absolutely no sort of boa expert though so hopefully someone like Jimi can chime in here.
The boa we are fostering, Morgaine, will get VERY snappy when she's hungry and it's not unusual for her to slam her tub once or twice out of pure hunting excitement as soon as she even scents her weekly rat. It's quite the exercise in fast, exact movements to get her tub lid off quickly enough to get her dinner in before she manages to tap her nose too much on the side of her tub.