I got an 08 royal last year at start of November that only weighed in at 245g & she felt light & was hollow underneath. She's probably the best feeder that I have now & weighed in at over 500g last time I checked; she was only getting small/med mice but I'm not sure how often. She was healthy but small & slim, now looking great & getting prettier every time she sheds. I haven't been power feeding, just let her make up for lost time & I'm slowing the feeding down a bit now as I don't want her to get fat just bigger.