What should you do if a horse on a trail stops, turns its head, and whinnies?

When a horse stops, turns its head, and whinnies on a trail, it's often signaling that it may be feeling anxious or uncertain about its surroundings. This behavior can indicate that the horse has noticed something that could potentially be alarming or distracting, such as other animals, unfamiliar objects, or changes in the environment.

Preparing for an emergency dismount is an appropriate response because it allows the rider to be ready for any sudden moves the horse may make, ensuring the rider's safety. If the horse is tense or agitated, it may try to bolt or rear, posing a risk to both the horse and the rider. By being prepared to dismount quickly, the rider can minimize the risk of injury.

The other options might not adequately address the situation. Continuing to move forward with a leader and rope, waiting to see what happens, or making the horse walk in circles may not effectively manage the horse's anxiety or help ensure everyone’s safety. These responses could potentially escalate the horse's concern or contribute to a more hazardous situation instead of addressing the immediate signs of distress.