What kind of dog is Duke? The way we house trained our poodle was we put newspapers down for her at first (in the house) and when she went on them we would take them outside with us when we took her out and then she would smell that and see that's where she had gone before and then she'd use the bathroom outside instead of in the house. It took time but she is now 6 yrs old and never uses the bathroom in the house!!!
Also putting him in a crate/dog carrier would be a good idea too. Just only let him out when you're playing/feeding him or taking him outside!
*Some people come into your life and quickly go, but some leave footprints on your heart and you are never the same*
*We only fall so we can learn to pick ourselves back up*
*Life is not measured by the amount of breaths we take but by those that take our breath away*
*Life is made of millions of moments, but we live only one of these at a time. As we begin to change this moment we begin to change our lives*