Canine communication and emotional perception in dogs

Dogs communicate through a complex repertoire of non-verbal signals, including tail movement, ear position, gaze, and body posture. A wagging tail does not exclusively signify happiness; it can indicate arousal, which may stem from excitement or nervousness. For instance, a high, stiff tail with short, fast movements often signals alertness, whereas a relaxed tail at mid-height suggests a calm state.

To manage tension and avoid confrontation, dogs utilize subtle behaviors such as turning their heads away, licking their muzzles, yawning, or shaking themselves even when not wet. These actions serve as signals of discomfort or stress. Additionally, a dog that remains very still with a fixed gaze and short breaths may be requesting personal space.

Canine expert César Millán notes that dogs are highly perceptive of human emotions. Beyond perceiving affection, dogs can detect sadness, frustration, confusion, boredom, or laziness in their owners. They achieve this through continuous observation of human tone of voice, body language, facial expressions, and changes in daily routines.