My pac man frog hypno is not consistently eating. He will go underground for days at a time. Im pretty sure hes underweight. He is kept in a small critter keeper. He does not move around much and ive felt this would be easiest for him to hunt right now. Currently I tong feed him small to med crickets. He will open his mouth often if I touch the cricket to his face. I have a 5 gal tank with an overhead light. Should I move him to that or is it too big? How frequently? Should I change his substrate from cocoa coir to papertowels for a bit to monitor better. I haven't been able to get him to take dubia at all but if he will would that be better for him?