I have a 6 year old min schnauzer and 2 year yr old schnoodle. Fro the last month the 6 year old has stared peein and poo in the dining room late at night after we have gone to bed. They eat between 5-6 and are let out about 10:30 pm. He did this once before when our daughter went to college but the settled back down and stopped. If the weather is going to be bad they stay in the kitchen while we are at work and we never have a bathroom problem. This happens only late at night (or early morning) . The 2 year old is just fine. And what do I do to stop this behavior?