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Disinfection is needed because many germs are airborne, and some are brought by the chicks themselves. And it is inevitable that there will be on the balcony, and it is recommended that you should do epidemic prevention for the chickens, at least to do Newcastle disease epidemic prevention, absolutely experienced. Hope it helps.
If you don't want to raise it just because of, you can find a larger cardboard box to keep in it, clean and easy to manage. >>>More
It is better to put it in a cage and give it some food.
Make a shelf.
Raise the turtledove cage. >>>More
You said that there are two swallows on the balcony on the second floor, this is normal, swallows, like your house, now many swallows will make nests in other people's homes.
It's okay, I don't usually abandon the eggs, so try to disturb them as little as possible.