We recently adopted a Siberian Husky from a shelter. They don't know if he's housebroken. He's walked in the morning and is let out in the yard during the day. He's then walked at dinner time and bed time. In spite of that, he urinates and poops in our bedroom (although he has urinated in other rooms also) . He's been to the vet and there is no urinary tract infection. Help!!