I've fed my adult male both frozen and live. When I first got him he took a few f/t rats for me, but after a brief mite outbreak decided to no longer take the rats, so I tried a live mouse and he has been fantastic on live. My baby is also on live now because that is how she started. In my opinion, as long as one is being a responsible owner, both live and frozen are fine, and some snakes will prefer one method. Any good owner will do what is best for both them and their pet in the long run. On a side note, I've come to prefer live because the frozen rodents can carry mite eggs on them that will hatch after passing through the snake, though that is rare, I was just unlucky.