Ok ok, I'm not reading each response, I just scanned the first page...
I am of the opinion that, for me and my family, providing the best possible life for my chickens requires minimal caging. My goats have a pasture but my chickens and ducks free range. When I acquire rabbits, they will have large tractors to allow them daily grass and exercise. Otherwise, all my animals are secured in a large shed turned "Zoo" (and ducks in run) every evening, sounds similar to what you have although we have made interior modifications.
I truly believe, even though I have lost animals to predators, that I am giving my animals the best quality of life. Some may disagree, and that's ok. Some may adjust what I do to be a bit or a lot more restrictive. You CAN have happy confined chickens, it's just not my personal belief to confine.
I can say from experience that predators, including random pet dogs, will take animals EVEN IF YOU ARE RIGHT THERE. Animal predation does not simply happen under the cover of darkness, unfortunately. We must accept this fact and take reasonable measures for our individual situations.
I would aim to make your night barn as secure as possible. Be diligent about checking on animals and locking up in the evening, which can mean checking the barn for stowaways.
Humans have had domesticated animals for thousands of years. We have not had fancy materials like electric fences, chain link, or motion sensors until recently.
You've got this
