I breed them so it's a lot easier to grab one out, bring it 5 feet to the snake cage and drop it in, if he's not interested, take it back out and put it in the cage. Otherwise I'd have to co2 them, freeze them, take them out and thaw hoping he wants to eat that day, heat it up and play with it, he's not interested in f/t anyways. I also think the fresher the better.