So I hatched 8 snakes and got them in individual tubs, etc etc. Standard hatchling care, as has been stated numerous times for advice here.
They're in a room with our bugs (feeders for other reptiles), and are completely left alone other than feeding and cleaning, the sound in there isn't much (the crickets don't chirp, and the other insects don't make noise and nothing is out messing with the BPs).

After 6 of the BPs have got to the point of being decent eaters or amazing eaters, two still hadn't eaten. A 30 and 20 gram. They got skinny, to the point of having terrifyingly thin bellies because they hadn't eaten mice or rats that were offered, live or frozen. Finally I caved and forced pinkies, which was one of the most stressful and depressing moments I have ever had with a ball python. It really hurt to do.

What should I do now? I am going to wait a week and offer food again, but... how can I make things easier on them? Outside the standard hatchling protocal, I have no idea. Aspen, 6" hide, water, 6qt tub, temps are right in their tubs... Nothing else? Maybe I could darken their tubs a bit by putting something around it to help reduce the light level? I dunno. At the moment I'm hoping that once they digest they won't be so bad with food. Maybe I should wait 10 days instead of 7?