Quick Answer: Tail height indicates arousal and confidence: high tail = confident or assertive, low or tucked tail = uncertain or submissive/fearful. Tail wag direction and speed indicates emotional valence: faster wag = higher arousal (positive or negative), wagging to the right = approach-oriented, wagging to the left = withdrawal-oriented. A still, high tail is often a warning — more concerning than an active wag.
Tail Position Guide
- High and stiff — high arousal, confidence, or assertiveness. Watch the rest of the body.
- Mid-height, loose wag — relaxed, friendly. Whole-body involvement confirms positive.
- Low and slow wag — uncertain, slightly apprehensive
- Tucked between legs — fear, submission, or significant anxiety
- Still and high — alert, potentially threatening. Combined with stiff body = warning.
The Whole-Body Read
Always read the tail with the whole body: a wagging dog with stiff posture and hard eyes is not friendly. A wagging dog with soft eyes, relaxed posture, and a loose body is genuinely happy. See the complete body language guide.
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