I know what you are talking about. Nolee has been trained for a year now. He has just recently started sleeping in bed with us. The last couple of weeks, he started going potty at nite! I have to go let him out during the nite usually between 2-5. He never use to do that! My husband says he has me trained! Well, if he is barking at the door he needs to go! He will go potty and come right back in and back to sleep!! I was wondering the same thing, if this is a habit starting??? Hope not, but what to do??