A stocking is a white leg marking on a horse that extends from the hoof up to or above the knee on the foreleg, or the hock on a hindleg. It is one of the most prominent and easily noticed leg markings, covering a substantial portion of the lower limb and giving the horse the appearance of wearing a white sock pulled high. Stockings are common across many breeds and are recorded in official identification documents alongside facial markings.
Stockings vs Socks
The terminology around white leg markings follows a rough height-based system. A sock typically extends from the coronet band to somewhere below the fetlock or knee — a shorter marking. A stocking, by contrast, reaches at least to the knee or hock, and in some horses extends well above. When a stocking reaches the knee on a foreleg or the hock on a hindleg, it is often referred to as a full stocking. Some registries and breed societies use slightly different criteria, so context matters when reading studbook descriptions.
Below the fetlock, a short white marking confined to the pastern area is called a pastern marking, while one covering just the coronet band is a coronet. These gradations matter for passport accuracy and breed identification.
The Pink Skin Factor
White hair on a stocking almost always overlies unpigmented pink skin. This has practical implications. Pink skin is more sensitive to UV radiation and can be prone to conditions such as mud fever (pastern dermatitis), particularly in horses with white markings on the lower legs. The reduced pigmentation means the skin does not have the same barrier protection as darker pigmented skin.
Horses with four white stockings — sometimes called a horse with “four white legs” — were historically considered unlucky in some equestrian folklore traditions. In practical terms, owners with such horses simply need to pay closer attention to skin condition, particularly during wet, muddy winters when mud fever risk increases significantly.
Stockings and Horse Identification
Leg markings are recorded on equine passports and registration documents using standard terminology and diagrams. A vet or passport authority will note which legs carry stockings, the approximate height of each marking, and whether the edges are clean or irregular. In the UK, all horses and ponies require a passport under legislation enforced by the UK Government — accurate marking description is a legal requirement.
In racing, leg markings including stockings help stewards and officials identify horses on course. Racehorses are described in form guides, commentaries, and form books using their leg markings as one of several distinguishing features. See also: blaze for facial marking equivalents.
Breed Associations With Stockings
Certain breeds are more commonly associated with four white stockings than others. The Clydesdale frequently displays prominent white stockings, sometimes extending well above the knee, which contrasts dramatically against the feathered lower legs typical of the breed. Paint and Pinto horses often have extensive white including stockings, while Thoroughbreds may have stockings on one or more legs alongside a blaze or stripe.
Frequently Asked Questions
Does a stocking affect a horse’s health or soundness?
The marking itself has no effect on soundness or athletic ability. However, the pink skin beneath white markings is more susceptible to skin conditions, particularly mud fever and photosensitivity. Owners should inspect the skin under stockings regularly in wet conditions, ensure legs are dried properly after washing, and apply barrier products during muddy seasons to reduce mud fever risk.
How is a stocking recorded on a horse passport?
Each leg is assessed individually. The passport will note the presence of a stocking, which leg it is on (near fore, off fore, near hind, off hind), the approximate height of the marking, and whether the upper border is distinct or gradually fades into the coat. This information appears on both the diagram and the written description section of the passport.
Can you tell a horse’s temperament from its leg markings?
No. The old folklore that horses with four white legs are difficult or unlucky has no scientific basis. Temperament is influenced by genetics, breeding, handling, and training — not the distribution of white pigmentation on the lower limbs. Many extremely successful competition horses and beloved riding horses have had prominent stockings on all four legs.