I didn't want to tackle the skin toxins as I'm sure this comment is about to come... But. I have a friend who keeps large enclosures of American Green Tree Frog and have found them to be cannibalistic when the size is right.
'Allright, well I do appreciate your imput. I just didn't want another tank lol. I have a 18x24 mossy tree frog tank, a 20 and 10 gallon bullfrog tank, 18x18 whites tank and an 18x18 GTF tank, 12x18 RETF tank, and a 60 gallon fish aquarium....Too many tanks.