Do you keep retics and have extensive hands on time with the species? I have a couple retics that have very low feeding responses. As for cage aggression, it depends what you deem as cage aggression. Frankly, I hook train all my snakes, tap them a couple times with the hook to let them know it's time to come out. It's an amazing practice that if used would eliminate so many bites in the hobby. Can I reach into any of my retics enclosures without tapping them first? Yep. Will I get bitten? Probably not. Do I chance it or would I chance it with any snake regardless of size? No. Why risk injury to yourself and the snake that isn't needed.