Mine are on FT rats, but the picky babies/subadults are eating live. Im temporarily out of live rats the right size, so they've gotten mice, but it's cheaper for me to feed rat pups/weanlings (when I have them). I have one adult male who just stopped a fast with live mice, the last two weeks. (darn it!)

Just be careful. I understand that switching back and forth may cause the snake to stop eating---balls being imprint feeders. I know my ball pythons are all much pickier than my boas or corns or the other species I have. Only one of mine will eat anything FT you put in front of her nose. Everybody else is specific to what they'll eat--VERY finicky