None of my 3 girls mark, they go out pee once and that's it. Buster doesn't mark either, he doesn't even lift his leg. Charlie on the other hand is a major marker. He pees everywhere the other dogs do. He's good in our house, but I don't trust taking him to anyone else's house. When we got him he did mark in the house, I had to keep him tied to me with a short leash, or crated when I couldn't have him tied to me. I don't remember how long I did that, but I now do trust him in the house, I can't remember the last time he marked inside.