I'm sure they will be ok! My broody chicks always get all sorts of interesting tid bits that the hens find and since my hens are with the rest of the flock that also means whatever scraps I give them and they seem to be perfectly happy! I have several healthy teenager chickens that are happy healthy birds that were raised that way.

It's funny because I'm always cautious about what I offer my brooder babies too. The only treat I offer them is scrambled eggs but the little ones with broody hens outside get everything from watermelon, kale, bugs, grass, and who knows what else and everyone seems perfectly happy, lol.