Drew,
Welcome to the forum,

Personally I don't have much experience with FBT.
But others here do.
But with out detailed photos we can't tell much.

I know one of your babies likes to hide but if you can send up some shots at different angles
that would help.

In the frog world almost all males call when they are ready to mate.


it also depends on the age of the frogs juveniles may not call.
Hope this helps.
And welcome to the hobby.