I know the feeling, Magnus is pushing 500g and one small rat didn't look big enough for him today. So out of curiosity I offered the other and that was snapped up as quickly as the other one was. Seems like 400-600 is the "eat anything that is offered" range.

Still gonna wait 3 days before handling and probably 2 weeks before his next feeding, but he'll be getting a medium at that point, depending on what the weight of that medium is.