f/t man. It's the only way to go. Not only safer for the animals, but cheaper, less messy, less stinky, and could you imagine a rat taking a chunk out of your $75,000 albino green anaconda? I'd have a heart attack. f/t gets my vote. The only time i've had to use live was to coax w/c or baby colubrids into feeding, and even then, there's other ways around it.
Jay