OK, when we bought this house, we built one of those big cages, but it has an open passage into the house that is never shut and has various trees growing in it. We built it for our cat so she could go in and out during the day and she would be safe as would the local wildlife. She has the run of the house and her own outdoor area. I abhor keeping birds in cages. I would not keep a single bird in one of those cages, much less dozens of people.