What term describes the long hairs on the fetlock and pastern of cold-blooded horses?

The term that describes the long hairs on the fetlock and pastern of cold-blooded horses is "feathers." This term is specifically used to highlight the dense, longer hair that provides insulation and protection for the lower legs of these breeds, which often have a heavier build and thicker legs. These feathers can help prevent mud and debris from entering the sensitive areas around the pasterns, which is particularly beneficial in more rustic environments or during wet conditions.

In contrast, other terms such as "whiskers," "tassels," and "fringes" do not apply to this feature on horses. Whiskers refer to the sensory hairs on a horse's muzzle that help them navigate their environment. Tassels are generally associated with decorative elements rather than a specific type of hair on a horse's legs. Fringes imply a hanging or ornamental quality not characteristic of the hair found on the fetlocks and pasterns. Thus, "feathers" is the accurate term that describes this distinct feature found in cold-blooded horse breeds.