Oh yeah, rat fuzzies shouldn't be too hard to come by. At her size she should be on at least rat fuzzies every 5 days. Pick a rat that is about as big around as the fattest part of her body or if you have a scale (produce scales work great) about 15% of her body weight. A mouse fuzzy is a small meal for her. I always insist that ball python owners start their balls on rats because they are more nutritious than mice and switching younger balls to rats is usually easier than switching an adult mouser. Its no fun having to feed an adult ball 5+ mice in a sitting when its easier, cheaper and healthier to give it an appropriately sized rat. So lets say, in theory, she weighs 200 grams, then I would feed her a prey item that weighs 30 grams or so every 5 days. After she hits a year old or so I would move her onto a 7 day schedule. This is just a general rule. You'll learn to read her as to her needs. Some are just slow growers and will only eat a small meal every two weeks. Others will eat 2 appropriate sized rats a week and beg you for more.