The URL doesn't want to copy correctly, so i'll just copy and paste the terms I used to describe his behavior. Most of you know what this means, but just in case.
Raised Hackles-
Hackles are the hair on the neck and back that are raised involuntarily in anger or flight. Fearful Threats-
A slinky low posture with the tail between the legs and the ears rotated back to one side. T-Bone-
Dominate gesture of placing the head over the shoulders of another dog.