Hey, my first ball python, my pastel, at last ate the mouse after 3 weeks of ignoring his food. I don't have pictures now (Sorry, I'll get some later), but he ate a good sized hopper. I heard the mouse squeal, and sure enough he was constricting it, and later proceeded to eat.

I downsized his enclosure to 10g and added some newspaper, so thanks to everyone who has posted that trick, I've been looking around. I'll feed him a couple more times until I begin handling him.