I feed my 2 PacMan frogs a mix of Locusts, Mario worms, earthworms and crickets. My large PacMan would only eat Locusts as that is what the pet shop fed him so I starved him and then started him on earthworms. Whereas my smaller Pacman is a glutton and will go for anything that moves.

I feed our Cane Toads and Pacman frogs the same diet. Are locusts a no Pacman frogs ?

I guess you just have to keep trying different things, have you tried small locusts ?