I just acquired a 4-year-old named Zhara. She's been with her breeder/owner since birth and always had indoor and outdoor access (lived in a house). I was told that she was housebroken and, for the first week that I had her, she faithfully peed and pooped outside. Now in the second week, she has taken to pooping in the livingroom. She'll pee outside but won't poop.
Because I'm working full-time, I have to leave her and Ziggy alone for most of the day, though a dogwalker does come by around 1:00 to take them outside.
I've been rewarding her everytime she does go outside - a treat and lots of pets and praise.
I hate the thought of crating her but am getting tired of coming home to piles on the livingroom carpet.