I've had my iguana for about 9 years now and bought him when he was just a baby. It consistently lived around people and we always took him out of the cage, played with him, etc. Then, all of a sudden, last year he became SO aggressive. We cannot take him out anymore, he jumps at us when we walk by the cage, whips his tail at us, etc. What could have caused this change? He is still eating like normal, and doesn't hide or anything. He does puff out his little flap under his mouth a ton now. This aggression has been going on for almost a year now. What can we do to help him become nicer again? We would take him out if we could!