Wild birds usually have mites and their nest full of them. Sevin Dust(5%) can be dusted on baby being careful of eyes. After babies leave, treat the nest.
Mites are common on baby birds in the wild. Mother often preen them for the mites. You can get a powder from a veterinarian to help kill off the mites.
Animals in the wild have their own ways of dealing with mites, they do not need humans to take care of them. In domestic birds you can bath them to remove the mites.
