Angelique
Posted : 4/12/2007 11:23:44 PM
A wagging tail which is elevated and wagging stiffly, is different from a relaxed, greeting wag or a purely happy wag where the whole butt moves in a swinging motion.
Go by all of the other cues to his behavior, and then look to see if the tail is also communicating a tense, aroused, and/or apprehensive state by it's level and stiffness.