Abbie is housebroken at home and at my parents' house but we took her and Max to a friend's cottage last summer for a weekend and Abbie kept peeing in the house. Max had on his belly band so we knew it wasn't him (he's not fully housebroken and he's 3 years old
). We found out later that a pug had peed all over this house in the past so apparently Abbie smelled all of that and thought that she was outside. We didn't think it was her at first because she NEVER goes to the bathroom in the house but we caught her in the act before the weekend ended.