what do i feed them, i guess fish food, like the other guy said, i have never raised frogs, so i have no idea what to do

these are definally american bull frogs, i watched a utube video on them croaking, http://www.youtube.com/watch?v=M02_dnl9zCA and thats what they sound like and look like, the leapord frog has clicks and has spots on its back i think, bull frog make a noise as loud as a train horn...LOL really load, especially when the noise echos on the pool walls, im so use to it now, only noise at night i can hear!!!