Okay, finally found a big surprise this morning. Took about a week!

So I have started feeding night crawlers for the past 5 days or so. I'm currently using tongs, any tips useful for tong training or it's just a matter of holding the food with them and get the frog used to it?

Also, Sometimes he eats 4 pieces, sometimes 3 sometimes 5. Is this normal? Tonight, he seemed hungry, as soon as he saw one piece of worm he launched like a torpedo, and flipped over hahahhaha; but then only ate 3 pieces with the last one being kinda forced because I annoyed him until he ate it( sat for about 20-25 mins there). I'm not sure if it's maybe because he is not used to the tongs yet, I just want to make sure I'm tong feeding the right way so it does not interrupt his eating pattern.