Oh yeah,...luckily Dino has never bitten me . I just got him back after being over seas for a year and yeah he was fed in his enclosure so he's very cage aggressive now. Anytime he heard the key in the lock he'd ram the door. Even if he was sleep there was no hesitation to look and see or figure out what was happening. So I took the lock off but I still don't trust him in his enclosure now. I open the door and wait until he's ready to come out. Then take him out or let him come out before I do anything in there.