Maggie, my 16 month old lhasa apso, will not quit pooping on the couch downstairs. That is the only place that she will go, and she never pees, just poops. I have even gone as far as buying new couches-no scent on them at all. She started doing it again. I have caught her in the act and taken her outside immediately. But she just stands there. I could let her out for hours and she'll poop out there, but sometime after I let her in she goes downstairs and goes to the bathroom. Why does she do this? There hasn't been another dog in the house, Jasmine and Katy are both potty trained. I'm getting VERY MAD and I don't have the slightest clue as to what to do. Any suggestions would be great.