Thank you both for the advice and support. I did try to tease feed but he seemed to think he was being murdered any time I touched him (reasonable when you're so tiny) .

I've tried it with the other two as well as they are currently being stubborn, but the only one who doesn't think he's being murdered every time (still does most times) is the one who has been a good eater until just recently. That one just shed today so I assume he will start eating again. If you do have advice on how to keep them from being terrified in order to tease feed, I'd love to know for reference even if I hopefully won't have to do it at this point.

Fyi, I only touch them when necessary to move them, I mostly just clean around them and definitely don't handle them for fun - they're so tiny! I am perfectly happy just handling my ball python when he is not digesting or in shed as he is healthy, well established, and doesn't seem to mind.