Is he Fixed? Is he crated at all? Do you walk him at least twice a day for a half hour to 45 min.? Have you changed his food recently? When do you feed him? Does he get to eat any and all times of the day? Yorkies are used to a set routine and consistency is the key. They will always have accidents since they have small bladders. But it sounds more like a "Power Struggle", they love playing mind games too!
