My six year old adult neutered male std poodle has started peeing in the house. It took us a while to catch him in the act as we also have an 8 year old female spayed std poodle and weren't sure who the offender was. So far, he's restricted his misdeeds to the tiled kitchen and family rooms. Any ideas on solving this problem? The dogs have unrestricted access to our backyard. Generally the female prefers the back porch in the cooler weather and our male tends to prefer to be inside with me. He's a bit of a couch potato, though he's of normal (and maybe on the thin side of normal) weight and can be very active at times. Could this be a medical problem?