Personally I don't know where he's getting his information from. Cat litter is not good at all because the substrate needs to be something that holds humidity well and cat litter does not. Also the heat pad for humans is not made to be on constantly and you will have much more problems with this than a heat pad made for reptiles that is made to be a constant heat source. If you have her in a twenty gallon tank or something like that she needs to be at least a forty gallon breeder, twenty gallons is much too small for an adult ball python. And about this 200g of rat per month this is also incorrect. A ball python of her size should be eating at least an XL rat(275-375g) if not an XXL rat(375-475g) every two weeks. Basically she needs to eat a rat that's as big around maybe slightly smaller than the biggest part of her body every two weeks. I don't know where this guy went to school but he's feeding you bad information. This is the best website for herp information. Some of the best breeders, herp experts, and herp enthusiasts are on this site. You need to listen to what we're telling you.