With eaters that 'drop' I've had the most success in letting them coil then leaving for at least an hour or so and coming back. Turning off all lights and making sure there is no noise in the room could help too.

Try using a blow dryer to heat up the head of the rat, sometimes the head creates a helpful response that gets them to start eating it properly instead of getting frustrated and dropping it.

Good luck!!


Also, just because your other snakes are eating in that environment, doesn't mean she feels the same way in hers, so tweak things around a little bit and see if she prefers things a little differently. More hides, humidity, ext.