Ok then here is what I want you to do. Make sure there is a small flat depression in the coco fiber infront of the frog. Do not startle it. Take a 1" to 1.5" piece of night crawler that is not very thick and slowly place it 0.5" away from the frog infront of its face. Set the chunk down with the tongs so that the frog can see that the food came from the tongs. Close the container and quietly walk away. Come back 2 to 3 minutes later and look to see if the chunk is gone without disturbing the keeper. Everything I just told you to do should be as quietly done as possible.
Let me know.