I dunno if you need to tong feed them. You can probably get them to, though. I've only really gotten my Woodhouse's toads to tong feed. I hear they love crickets, so you may want to get them some. They'll acclamate to worms eventually. Some may like them more than others, so some may not ever like them. Or they may prefer smaller bites. I've noticed individual frogs have different food preferences.