Help With Eccentric Pottyer?

I have a German Shepherd-Husky mix. A female, three years old. Until about a year ago, she was raised with her sister, until they became too aggressive with one another and had to be separated. She's hyper, but well behaved, other than one tiny eccentricity... No matter what, the dog will not poo outside. She will pee fine and if she's on a leash, out roaming the yard, or on a tie out, she will pee a few times, but the second she goes inside, she poos on the floor. She can be outside for hours playing in the yard with the kids, and won't go. But again, the second she comes inside, she's using the house. However, she never pees indoors. It's been this way since we adopted her at 5 months old. I'm not sure if it helps, but she was rescued from an abusive family, and when we adopted her and her sister, Callie, the eccentric one, had some lacerations, and Shadow, her sister, had a fractured hip. Like i said, other than that, she's well behaved for a hyper dog. Any suggestions as to why she

Asked by Member 1089475 on Feb 3rd 2012 Tagged potty, strange, german, shepherd, husky, female, three, rescue in Behavior & Training