I have a 16 month old male Lab Mix and he has been very good with not urinating inside the house. The past couple weeks I noticed my dog started to urinate a bit when he gets excited. Also around the house I would notice spots where he would urinate. I'm not sure what is going on. Hopefully you guys can help me out. I heard dogs can go through an adolescent stage but not sure if this is it. He is house trained. Like I said it started about a couple weeks ago. Thanks guys.