We have a 2.5 year old female Chihuahua and have had her since she was 6 mo. We have a dog door which she knows how to use , so she has free access to the out side. For 2 years we have tried to break her of doing #2 in the house. Usually in the same place on a small carpet in the bathroom. She pees outside no problem but she does the other in the house usually when we are at work. We have 2 other Yorkies and have had no trouble from them at all. She even goes out with them. We think that her first owner trained her on a pad and may be thats why she goes there. But if we block her from going there she just goes somewhere else. We have tried everything we know of to break her of this but we are at a loss why she continues. Shes a smart dog so is she just lazy or what? Can anyone help us with this?