So far no worries glad its a girl how was she checked if its older popping doesn;t always work and she may need to be probed. She just got rehomed that puts her under stress. That would count for the shedding and the eating. If the shed came off its a good shed, no eye caps or sticky peices that stay stuck = good shed. All sheds are different diet, humidity stress, temperature, and the unknown all contribute to how a snake sheds check temperature and humidity. For feeding worries give her a few weeks in a quiet spot not handling her just an occasional peak to check, let her become aclimated to her new digs. Then try another rat, I try a smaller one then if she eats a slightly lager one the next week. Its also breeding season so ball pythons all tend to go aff feed occasionally. But its probably the stress from moving. Wait a few months before realy worrying, trying to feed her weekly if she still doesn't take it ok. BAll pythons can go months without feeding, so after a few months there are other tricks such as trying mice, afs, exposing the brain of a prekilled, coating the food with chicken broth, feeding in a paper sack. Just check in the forums and you will find other methods its a common problem. There are others with much more experience on the forum that can give excellent advice too.
Good luck plese keep updated Jean