those look like the froglets I have! I started out with 10 tadpole and 6 made it to the froglet stage. I found out that the couldn't swim very well so I transitioned them to a vivarium setup with a shallow dish with moss in it to let them get moist without drowning. I have tried feeding mine mini meal worms and flightless fruit flies. I am down to 2 live frogs. the others died with in the last day or so. I think they are starving to death. I have moved them to the food bowl when i add insects for them, but they hop away. I too am at a loss. : (