I have 2, 12-week old puppies and anyone who says their dog was potty-trained by this age is lying! haha. I don't think that is quite possible at all! My pups are confined to only my living room/kitchen area so I can supervise them all the time. I have a baby-gate in the hall way and another one leading downstairs to my door. I find what helps when they are this small is carrying them outside (quickest way to prevent accidents in the house) when they wake up. During the day when they are playing, once they start going by the stairs, it's time to take them outside. I had to put the baby-gate at the stairs because once they learned to go down them, all they wanted to go was go up and down even when they didn't have to go. I take them out 5-10 mins after they eat, 20 mins after that, and usually every 30-45 minutes during the day. I know it definitely gets tiring (I have 2 to deal with over here who need to go out separately!)..but I rather run up and down those stairs than complain that my dog went in the house...afterall..it's NOT the dogs fault..it's our own (Remember that). Repeating the same word every time you go outside is very helpful, it lets the dog associate that word with what they have to do. My previous boxer never let us know he had to go outside..like another member said..he trained us to take him out every so often..which I think is a good thing..we have to learn as "parents" to take them outside and NOT be angry when they potty inside.