I think Paul being in the feed room area right after speaking on the phone with his buddy about his concern for the dogs tail helps with the theory that they were killed just before 9pm. He was down there looking after the dogs and was talking to his friend and intended to send him a video, but I don't believe he did. Then the friend tries to reach him several times after that with no response. Now we hear he was inside that room not facing the door. He was distracted looing for something and Alex surprised him. Alex waited until he was in a position he couldn't get away. He was defenseless in that feed room.