A friend of our family had a farm, one of their neighbors pulled down an old barn and found a baby barn owl. We raised it, let it fly around the house, dad built a cage outside for it, we consulted vets for proper feeding. I raised white mice in a aquarium in the garage to feel it, it would perch on your hand and let you scratch it's head.
Finally it was big and strong enough to fly on its own, dad opened the cage and it took straight off and was never seen again
We did sometimes hear owl sounds at night...