This is a common question that gets asked quite a bit, but no less needs an answer if possible. I've been trying to switch my ball over to rats without any luck other than her looking somewhat interested, yet not knowing quite what to do with it. But my main issue is worry over if the rat I'm trying to feed her is too large and if that could be the cause for her not switching. Right now she weighs 378 grams and I'm feeding her two small adult mice, which is way too small for her in my opinion. I've tried a small rat that weighs 40 grams, it doesn't look like it would be too big for her yet she wont take it. So is a 40 gram small rat too big for her at her current weight?