Ever since we moved into our new place, we've been leaving our two dachsunds out instead of putting them in their crib when we are not home. Any time we both leave, one of them (I think it's the runt, they're brothers) makes a mess in the living room. He's doing this on purpose, he scatters his mess in front of chairs we usually sit in, by the computer, etc. How would we get him to stop? I know dachsunds like being around people, and can be quite spiteful when left alone, but this is getting out of hand!