My ornata has now food preferences : how to manage

[GRABibus]

Hey,

my male ornata ate everything during the first 3 weeks I got him (crickets, roaches, locusts, nightcrawlers).
Now, since 10 days, he clearly shows a preference for nighcrawlers and is not interested anymore by crickets or roaches.
They can run in front of him during a lot of minutes, no way. Except if I force feeding with tong, they he catches them.

How do you manage a pacmn frog whiich intends to eat only 1 type of preys ?

Do you try to not offer anymore this prey during week in order to force him to eat other preys (Crickets and roaches) or do you stay with their preferred prey....with a risk of carency....