Dog poops in the basement

Question
I have 7 month old dog who along with my 12 year old Black lab spends time in the basement while we are away. They have a dog door and can go outside at will during this time. The basement is better tempature regulated in both summer and winter so this has been arrangement that has worked out well unitl our now 7 month old dog "JJ" came along. JJ likes to poop in the basement. I have tried spraying the areas he poops with various sprays, and of course the nose in the poop with a sharp no and a trip outside. I have tried feeding him once a day and kenneling him in the basement. In the morning I let him out before work and take him fow a walk until he poops. But within minutes of me leaving for work he goes straight to the basement and poops 1 or two more times, before my son can get dwonstairs to re kennel him. I do not like the idea of confining him all night and then again all day until we get home, but I am running out of patience and options. HELP!!!

Answer
First of all, stop pushing your dog's nose in his poop, and punishing him.  It doesn't work, as you have seen, and serves no purpose except to make your dog dislike you, or teach him that pooping in your presence is dangerous.  I don't know how you would expect a seven month old puppy to train HIMSELF that the dog door means he should only go outdoors.  That's your job! The only thing that trains a dog that he should go outside is for you to go WITH him and reward him when he does so.  Teaching him about the dog door comes later, after he is trained to urinate and defecate outdoors.  Therefore, you were on the right track thinking you might have to confine him when you cannot supervise him.  If you are walking him until he poops, you are obviously stopping your walk too soon if he is pooping again immediately upon your return.  Some dogs need to walk to get the bowels moving, and they need a few stops.  Other dogs defecate and clear all the feces in one operation.  If you are still having trouble once you begin supervising more diligently, rewarding him for good performance, and ignoring any "accidents" (which are nothing more than inadequate supervision of the dog), then try reviewing the housetraining procedures outlined in Patricia McConnell's book, "Way to Go - How to Housetrain a Dog of Any Age".  Good luck.