I have an adult female that I've had for a year since she was a froglet that will only eat hornworms and sometimes night crawlers (and horn worms are expensive and hard to find!). She was raised on staple of dubias, but hasn't eaten one in months. It almost seems like their thorny legs bother her. The funny thing is, my fantasy frog has become the same way (I was debating whether or not to post here or the pacman forum).
If I show her a dubia, she'll actually shut her eyes or dunk her head underwater! But it's funny to see her light up when there's a juicy green worm in her cage...but seriously, I think both frogs would rather starve than eat roaches now...
I was just wondering if anyone else has ever had this problem.