I think you're over reacting. Young pythons are very efficient when it comes to food and don't poo very often. That being said, how big is she? A fuzzy mouse is quite small even for the smallest of babies. She should be getting a prey item that's about as big around as she is every 5-7 days.
I'm not sure what you mean about the dry patch. When a snake is getting ready to shed, they will often have a red stomach (almost looks sunburnt), become dull looking, and eventually get opaque (or blue) eyes. Then they'll clear up for a bit and poof! shed.