Have you ever given up on a hatchling who won't eat?

[Bogertophis]

I would try a small live hopper mouse. Put it in the enclosure with complete darkness in the room and in the enclosure. Then when you can't see a thing get to the side wheres your snake can't see you and just listen and wait. If you hear the mouse squeal then you will know it worked. Wait a bit for it, if there is no squeal then turn on the lights and check on things. I would give it a fair chance though first. Some snakes would rather eat in complete darkness, you can't see a thing darkness. Letting the smell of the feeder be in the room beforehand is a great help.

I agree...feed live if you need to get a neonate/hatchling going...that's how nature programmed them.

Some snakes are still too timid & what has worked for me is to put a larger & heavy flat-bottomed pet bowl in the cage...something with sides that are 2.5"-3" deep,
that the live mouse/or rat crawler can't escape from. Leave this in dark cage overnight...many snakes feel braver if they can get a little above the prey to pounce on
them, as they can from the edge of this bowl (without tipping over the bowl). They have all night for the smell of prey nearby to entice them, & eventually they get
brave enough to search for it. Also, the prey doesn't get "lost" or tangled up in substrate this way, & with a first-time feeding, some timid snakes are put off by the
least little things. While nature is not this helpful to "wusses", as our pets we can manipulate things until they eat & gain enough confidence to keep eating.