Agreed. I always get a ton of replies.
Anyway, nick, its better to feed in a seperate container ...preferrably one thats so small that your snake cannot avoid its prey item, or visa versa. I mean, don't make it uncomfortably small for your snake, but for a 13 inch snake a small gladware container or a deli cup (if you have one) would be great. Also, you should probably wait 3 or 4 days after you got it before feeding it to give it time to adjust to its new home (I may be incorrectly assuming you just got it - if so, disregard the last sentence). Thats the best advice I have on the matter. Oh yeah, and make sure you wait at least 5 days after each refusal to try feeding her again. You don't want to create a permanent refusal response to food (there's a name for that, but i forget it). Plus, in 5 days she should be more hungry; hopefully hungry enough to eat.
Oh, and I feed my girl in the evenings and she's an excellent eater. Good luck with your girl!