since youve had him for a year, obviously youve fed him before. when did he start having trouble eating?

By "lunge" I mean jumping towards the food and biting it instead of using his tongue.

do you clean the cricket cage often? Also, unlike a lot of the hobbiests here, I dont disagree with not using supplement powders but only because I feed my pets insects that I feed fresh fruits and other such things, also, I feed them various types of insects. My recommendations is that you feed those crickets well and that you get some other prey items to feed the frog I.E - earthworms, mealworms, superworms, waxworms, grasshoppers, minnows, guppies, leopard frogs and bullfrogs, baby mammals, ect.