I would only let them outside if they can be out there with out being eaten by a predator or wander away. A closed wall of fencing or some type of fencing would help keep them safe . They do need fresh air and sunlight to be healthy to. You don’t want to put them in direct sun light where they can’t get out of it but you know just naturally letting them wander around doing what ducks and chickens like to do. I bet your chick would love a good dust bath.and bugs oh my gosh they will eat up bugs.