I think if you get them neutered at a real young age you can keep them from doing that. Since he is 9 months and already doing it he will probably continue. Chachi doesnt mark in the house and I have a female yorkie also. He does mark if i go to Petsmart or the Vets where he smells other male dogs I quess. Anyway I am going to get a bellyband for him and put it on when we go to those places |