My 4 month old Bruno does great. I think he knows for the most part not to go to the bathroom inside. Or at least as well as I can expect him to at 4 months. He hasn't pooped inside for over a month and a half. However, it seems it is always at night that he will pee in the house. Even tonight, I took him out and we were outside for over 20 minutes. He did his deed and we came in. Not 15 minutes later while being in what I call "crazy puppy mode" where he sprints in circles or figure 8's (which is incredibly funny by the way) he just stopped and peed (I had given him no more water). I understand this could be from excitement but sometimes it seems as if at night he just wont hold it as long. Besides the obvious answer "train myself and take him out more" is there any other possible reason for this often happening at night?