3 months is a short period of time for a hunger strike and 30 grams really isn't worth worrying about. I didn't mean that you were afraid of feeding him a mouse in the sense that you were afraid of the mouse. Honestly too much is made of getting every ball python on rats. Yes it is more convenient for "US' in most cases. This doesn't mean however that every ball will want rats or that it is truly best for them.

I know yours had been eating rats but that doesn't mean a whole lot when he hasn't taken anything in 3 months. I had a female who ate nothing but rats til she was about 8 months old then decided that mice were more her thing. Once I got her eating steadily on the mice I tried switching her over again. Sometimes they just need a jumpstart on the old feeding response. Good luck with the next attempt.