I was walking Sirius yesterday, and someone complimented his tail. This happens frequently—it is an amazing tail—and wouldn't be worth mentioning, except for what she said next: "What a great communication tool."
I'll admit it. I just stared at her in dumbfounded silence for a moment and then kept walking. Why was I so taken aback? Because Sirius's tail is one of his worst communication tools, at least when it comes to communicating with new dogs, and has, in fact, caused him trouble on multiple occasions.
Let's start with a word about body language. Dogs communicate through vocal signals, of course, but they depend much more heavily on body language. (If you want to learn to better understand dogs, you can't do better than to start with body language.) Tails, both in movement and position, are one form of this body language. A very broad brush explanation of tail position follows.
Dogs have a neutral or resting position, which is where they characteristically...