Juvenile Blood Python feeding issues

[Bogertophis]

For most any new snake (any age & any species), waiting until they've fed AT LEAST 3 times for you at regular intervals (unless in shed, then refusal is normal) is the recommended allowance before any handling. Snakes are essentially wild animals that rely on their instincts for survival, even when captive bred- & in the wild, anything that picks them up is normally a predator about to eat them. Try to imagine how you'd feel in your snake's place- would you feel like eating if a scary giant started picking you up? Hmm, maybe not...

I have no experience with this species, but many years with many others, & I've learned that giving new snakes time to feel safe is what they need. That's not to say there's no improvements needed for your set-up or other techniques either- this is just a quick suggestion from what you've shared.

Try not to keep making changes, unless absolutely necessary. Instead of switching to a smaller home right now, it would likely be better to offer hides & substrate that feel more secure where he is currently, than moving him again, which would only unsettle him further. In the wild they need to learn their way around (where to hide for safety both from predators & from temperature extremes) so every time their home is changed, it's unsettling to them.

Also, when you first get a new snake, try to duplicate what was working for the breeder or source he came from- for that, you have to ask & press them for information, not just about what they're eating & how they're being fed, but the size & type of enclosure they were kept in. The more you find out, the better.