Hello, I am not a new as an iguana owner, however it has been 20 years since owning one. I got this one from a friend, he is estimated a year old. They never handled him only to clean cage about every other week. He was eating a bad diet. Ok, details now. I have had since Christmas of 2017, just under 2 months. We let him sit for 2 weeks before interaction with humans. after 2 weeks it was just me, 3 weeks the kids as well. He was doing good, getting real nice color, eating way better, and now as of 4 days ago, even going near the cage he is very aggressive, smacks the cage, and has tried to bite me once. He does need a bigger cage, i am in the process of building one, just taking financially longer that anticipated. My main concern when getting him was his health, and getting him healthy. Any ideas on why he/she would have changed so quickly?