Its not a matter of if I think it will work. Frogs like people have different personalities and naturally have instincts. These two species are not only cannibalistic, but can be territorial as well. It only takes them being alone together for a second and a disaster could occur and one could be severely injured or worse dead. Why risk something like that? Just to see if it could work? That is unwise. They're both solitary animals until it is breeding season.