I got an 8 year old Miniature Pinscher from a friend about 9 months ago, this is my first dog and before I got her, she was house trained and did not pee on the floor inside. Since I have owned her, she does does not ever pee on the floor while I am there, she will hold it as long as she can and if she really has to go, I got her a potty patch and she will use that. When I am not home though, she will always pee on the floor, even if I am only gone for a half hour. I am not sure how I can stop this since she only does it when Im not there and never does it when I am home. Everything I have seen on how to potty train dogs involves me being there when she does it. Other than this, she is a very good dog and does everything I want her to. Any help anyone could give me would be appreciated, I am at a loss for ideas.