What role do ear "poufs" or ear plugs serve for horses during transportation?

Ear "poufs" or ear plugs are specifically designed to reduce noise levels for horses during transportation. Horses have sensitive hearing, and loud or unfamiliar sounds encountered while traveling, such as traffic or sudden noises, can lead to stress and anxiety. By using ear plugs, the volume of these noises is diminished, which helps create a more calm and serene environment for the horse. This is particularly beneficial because reducing stress during transport can result in a safer and more pleasant experience for both the horse and handler.

The other options do not align with the primary purpose of ear plugs for horses. Blocking out scents is not a function of ear plugs, as horses rely heavily on their sense of smell. Preventing ear infections is also not a role served by ear plugs since they do not provide any protective barrier against pathogens. Additionally, ear plugs do not enhance hearing; rather, they are meant to reduce the auditory input to help the horse remain relaxed during transport.