First time Ball Python Owner

There's nothing to lose in trying to feed it. Either it takes it or it doesn't, and as was said, it already sounds thin so I say definitely try live and try today or tomorrow (Monday). If it does refuse, double check all your husbandry and then try again in another 5-7 days, since babies should be eating about every 5 days.

Good luck feeding and welcome to the forum!

what is he in and what is the size?

Well she just ate a nice fat hopper mouse so that makes me feel better. I am using a dimmer switch on a ceramic Overhead buld and a dimmer on a under tank heater on one side of the tank to make it the hot side. Every time I check the temperature it has been pretty consistent. I have the water bowl over the UTH so I can turn it up a little and turn the OH down a little to keep my humidity where I want it.

Did she eat a live or dead mouse? Also seems like you are pretty good with keeping her alone, yet making sure everything is normal as far as temperatures and humidity. If you are able to get the hot spot up to around 90, that would help with digestion, but Ball Pythons have been kept at mid 80's temps and do great, but a little warmer would be preferred.