I feed night crawlers for my african clawed frogs and it more or less drives them into a froggy frenzy.. I am surprised that any frog would turn down a juicy earthworm!
I don't see how a red wriggler or nightcrawler could be bad for a Pac Man (but I don't keep them so I'm no authority on this). Earthworms in general are pretty nutritionally rich, so again I don't see any negatives to them.
I have had to cut up worms for my smaller frogs.. I find the easiest method.. is using kitchen scissors.![]()