Well, the 5 days off food I would concentrate on that......why, how, and what to do to correct it.
That weight sounds maybe a little light, I would have to check some of my dragons in that size range, but im thinking most of them at that length are probably 150-175, I could be wrong, but thats what im thinking
I have limited hands on experience with trans, but I do have 2 which one of them was seriously small and lightweight, but she is coming around. I have seen a handful that are nice and plump, but I have seen alot of trans that appear to be small, or are smaller than what I would like. I think with some outcrossing and breeding het to het more, I think they will come around.