I have been looking around online and seems its possibly MBD but hoping not as I will have to take her to the Vet! The bottom Jaw seems to be a little wider than the upper and equally larger on both sides! I have pics of both iguanas and the second one is not having the same issues! I have submitted two pics of the one in Question and the really stout brilliant one is the other! Not sure if I have a male and female or not but I took them to a vet back in January after I got them she said they were too young to sex but had a feeling that they may be male and female! Let me know what you think! The Possible Female is the one in Question!