To each his own. Different strokes. All those cliches. Just because you wouldn't think of doing something, thinking it's crazy, doesn't mean someone else shouldn't try it in their own way for their own reasons. Tolerance.
Personally, I like my chickens outside in their own coop and pen. However, on occasion one may need to reside in the house due to illness, injury, or because the weather requires it.
I have a large dog kennel set up in the garage for the "guest". Every couple of hours, I haul the chicken out of its kennel and perch it on the window shelf where I have a newspaper. Without ever needing to resort to formal training, the bird always obliges, in short order, with a nice deposit. Then maybe a treat, and back into the kennel. It's been my experience they almost never poop in the kennel as long as I give them a potty break every couple of hours.
Sometimes I like to bring inside, one at a time, hens who have demonstrated an affinity for cuddling. We have a short session of one-on-one time in my lap, then back to chicken world they go.
But that's just me. My house smells fine. Like to keep it that way.
