She looks fine.... It could be 6 months old, it would mean it isn't feeded very often, or it didn't wanted too..Beleive it or not, i have a 2 year old male witch weighs around 230 grams. So i am not surprised by the fact this is a boa of 6 months old..

Give her all the rest for about a week or maybe 2 weeks and start trying to get her on feeding. And again, very nice coloration on this boa