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+1 to this. My birds all have open cage doors and they mostly stay in their cage. That's where their food and water is, and they only come out of their cage to go into another one
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That's a little different, no? A cage that is open that you can willingly access and leave versus being locked in a cage.
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Many birds with anxiety problems do much better at night in covered cages. The anxiety may be temporary (e.g. a new person/animal in the house) but nonetheless there are good reasons for it, and quite common in some species.

This just seems obvious to me, but I've been around animals my entire life.

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