Switching to f/t is a good idea if that's what you are most comfortable with, but if you want to feed live that's fine too. Just make sure you do so responsibly and find out what works best for you. Most of the big breeders feed live because thawing out hundreds of mice and rats just isn't feasible, and can do so safely. This is a very hot topic and as long as you do your homework I'm sure you'll do fine.