The vet I consulted said NOT to give antibiotics if you are planning to eat the eggs. I agree with Mrs. B.
I will administer Tylan injectable or TerraVet powder for respiratory distress and still eat their eggs.
You can give antibiotics for the most part without issue, but Baytril is one of those that renders a bird "useless" for eggs/meat/utility purposes. There are a few others, but they escape me.
Otherwise, "over the counter" antibiotics are fine to use... but only after you have identified the issue to treat for. Throwing antibiotics at a bird is never a good idea.
MrsB