I am a brand new dog owner. Yesterday I bought a 20 week old Sheltie from a breeder in my town. Since I have brought him home (1.5 days ago) he has only urinated twice. Both times were in the house and while he was lying down. He literally urinated on himself. I'm a bit perplexed. I have taken him outside to the backyard dozens of times since I got him but he shows no interest in relieving himself out there. Anyone have any ideas here. Thanks.