I beg to differ, I have indoor chickens. Yes, they do produce dust, and lots of it. And yes, I do have an air cleaner in the room the chickens are in, however, they are in a 2'x8' handmade cage. They are two bantam chickens, although I did have one lf chicken previously. They have plenty of room to run around, they have a small sandbox for dustbaths, sand isn't quite so dusty, but still lets them have fun. They also love to come out when I'm home and run around and play. They get crickets and mealworms, greens and varied diets.
Even when I take my chickens outside in the summer to wander in my yard with me and help me garden... they stick fairly close, or are following the dogs around. They seem perfectly happy as housepets. They thrive on seeing you when you come home, they are very interactive, MUCH more than a few parakeets imho.
Plus we get little edible eggs.
Again, they are much more work if kept indoors, but some of us don't mind, and neither do the chickens.
I don't think I'd take a full grown free range chicken and then lock them indoors, they would more than likely freak out, but raising them indoors, they get used to their surroundings. Again, pick breeds that do well in confinement and are docile, which I think Silkies would qualify, and enjoy having chickens.
No worries about predators, cold, heat, getting called in by neighbors. They make wonderful housepets.