When my tadpoles hatched, they were a type of frog in the genus Rana (cute little Leopard Frogs), and had to be fed pretty much as soon as they hatched. I didn't keep them, only raised them until they could walk on land, and then let them go back in the pond. But they ate simple dead bloodworms. They were nice and fat and happy.
But I'm sure they were even happier when released, haha.
Cam, I'm not sure why you're being so defensive. I was only stating what they seemed to sound like to me, based on what I've read about American Toads several years ago when I was trying to identify my tadpoles.
Katniss, I had two different tadpoles, too. I had those cute Leopard Frogs, and also a type of toad that I'm unable to remember exactly the name of. But they all looked pretty similar as tadpoles. So, it still could be either or at this point.