There is nothing wrong with feeding live as long as you supervise to some degree. I feed my collection f/t because it's cheaper, but I do have a few that will only take live. I will leave pinkies and pups in overnight if they don't take them right away, but anything larger they get a few minutes to make a move before I turn the lights down and wait. I want to make sure they get a good grab before I leave them alone. Snakes know what they are doing and sometimes we worry about them a little too much.