What behavior in a horse might indicate discomfort or stress?

A swishing tail is a common behavior among horses that can indicate discomfort or stress. When a horse swishes its tail, it may be a sign that the horse is feeling agitated, annoyed, or experiencing discomfort, especially if it is accompanied by other signs of unease like pinned ears or a tense body posture. This behavior acts as a communication signal to both other horses and humans, showing that the horse may not be entirely comfortable with the current situation, environment, or handling.

A horse with its head held high may be displaying alertness or curiosity rather than indicating discomfort. A calm demeanor generally suggests that the horse is relaxed and not under any stress. Similarly, relaxed ears indicate that the horse is at ease and in a state of comfort. These behaviors contrast with a swishing tail, reinforcing its role as a key indicator of possible distress or discomfort in a horse.