She's small but I wouldn't sweat it since she looks healthy. I got a male who was underfed from the start and was around 150g when I got him at 10 months old. he looked healthy and proportionate, just tiny for his age. He was on adult mice of about 30g each (although the guy who owned him must not have been feeding very often), so I went straight to rat weans (about 35g) with no issues. I fed every 5 days at first and have moved his prey size up accordingly over the months and am now feeding small rats weekly (he refuses sometimes now, so I might go every 10 days soon), and he's been up to about 1000g for a couple of months now. I only got him in August 2013, so he's now about 16 months or so. They make up lost time fast if properly fed.
As comparison though, I have a female hatched Aug 6th (so 6.5m) and she's over 800g. My female hatched mid Sept (so 5 months) is about 650g. They are great eaters though. I think it's clear that yours was "underfed", although it may have been due to pickiness and not neglect.
Reply With Quote