My mother has a bantam polish rooster that lives in the house. She loves him and he is a good boy. He has a large bird cage, modified for him, to sleep in... but during the day, he is mostly out. When he visits my house, he wears his diaper, but at his house, he is pretty well trained.
I have a bantam polish hen, Wilamena, who lives mostly in the house. I have a backyard coop and pen for my girls, but Wilamena prefers to be inside with us. She spends most of her time in the sunroom on "her" chair and comes in to dinner with the family. She gets her own little plate (on the floor, of course)... and when done, heads back out to the sunroom. She does like to watch animal planet and will come in and lay with one of us and watch TV.
My other girls come in to visit once in a while, and they are very well behaved. They have their "accidents", but we are prepared and respond accordingly. Personally, I would much rather my chicken drop a dry oops on the floor than my elderly, very sweet, cocker spaniel pee all over the place due to a leaky bladder. (I don't even bother putting the carpet cleaner away anymore.)
In our house, it is normal to see a chicken in the window, or on the ottoman watching animal planet. My girls do not smell, and I keep the open cage that they sometimes sleep in very clean and tidy. They are also bathed as needed, are very cooperative when they need feet washing and such. They are also much smarter than many people think. When I put them in the wash basin for cleaning, Wilamena will hold her foot up for me to wash... then switch and hold the other up for me. I firmly believe it is all in how they are raised.
D