For some reason my pacman frog has not been eating by himself for about 3 months. The only thing he will eat by himself is adult female dubias. I have to force feed him earthworms and stuff by either rubbing them against his mouth or using something to gently open his mouth. I have him living in exo terra soil and he has a big, shallow water bowl, a hide and some plants. Three sides of his tank are also covered so he should feel pretty secure.