I do not know if this is okay or good or not, but I give mine a slice of bread twice daily. One slice shared among eight BBBs that Are 10 weeks old. I just started doing this two weeks ago to use as a bribe to bell train them to get them back into the coop. It’s working great and they love it. I know there’s very little nutritional value to bread for poults but as for a very limited intake like I’m doing, it seems to be just fine.
I’ve tried everything else from meal words to turkey treats from the mill to apples, cucumbers etc. they wouldn’t have any part of anything but the bread. Even that they refused at first. But once one has some the rest have to follow suit. You know how it goes. Anyway, good luck!