When my ig was a baby I used to keep a log of how much he was growing monthly. He didn't seem to be growing very fast at all to me, but when I kept a record of his measurements, he was growing quite quickly. I think he was almost full length size by the time he was 4, and for the past 11 yrs, he's been just filling out width wise (he's not overweight though). I even did 2 of those clays paw/handprints with him. (I was in middle school when I got him, I'm now 25 and in college.) There was a major difference in a 1 year time period. Iguanas seem to shed all the time in little patches. I think there is only like one week out of the month where mine isn't shedding at all. Not like my gecko who sheds all at one time.
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~*Chibi*~
Sir Iggy ( 1.0.0 El Salvador Blue Iguana), Ryo-ohki, Orion, Bud, & Finnegan (3.1.0 crazy kitties), Rosebud (0.1.0 cockerspaniel), and Kayko (0.0.1 leopard gecko)