My 3 year old Corgi has been trained since he was a puppy. We moved into a new place 10 months ago. About 7 months ago he started pooping and peeing all through the house. Not in just one spot either! He will start from one end of the house and walk and pee (or poop) from one corner to the other. He does not do it all the time, but he never had this type of behavior before. What do I do!