Why is my previously accident-free dog pooping in the house again AFTER a trip outside?

Zoe is a ~2 year old silky/mix rescue, I've had her 3 months. She was not housebroken when I got her, and she is now well crate-trained. When she's not in the crate and can't be supervised, she is gated in the kitchen. She's been making great progress with housebreaking. She hadn't had an accident in several weeks, and hasn't had a poop accident in probably 6+ weeks. On Tuesday, yesterday and again today she pooped in the kitchen, all times less than 30 minutes after a trip outside on leash in the yard, where she did pee. What gives? Nothing has changed in her diet or routine. Finicky eater, but regardless of when she eats, she always poops first thing in the morning, and again either before supper or before bed. These accidents both occurred within 30 minutes of a trip outside on leash in the yard to pee.

Asked by Zoe on Jan 14th 2011 Tagged housebreaking, pooping, accidents in Behavior & Training