Good afternoon YT!! Its me again with my little Colby

He is now7 months old and is still "mouthin" so to speak? I am getting very concerned with it because he is biting my children and sometimes myself during play, in the morning. He also pees EVERY time we let him out of his room! I understand he gets excited but is there something I can do for this? My boyfriend is kind of at wits end with the biting and peeing (not to mention finding a doggie sitter) and wants to sell him. I don't want to get rid of him I feel like I just got him!