The horny growths located on the inner side of a horse’s legs, above the knee in the front and below the hock in the rear, are epidermal structures analogous to human fingerprints or canine paw pads. These unique formations vary in size and shape between individual animals, and even between the fore and hind limbs of the same animal. They are a normal anatomical feature found on all equids.
Their precise function remains a subject of scientific debate, although several theories exist. Some researchers suggest they are vestigial remnants of digits, while others believe they serve as sensory organs or assist with leg stability. Historically, these structures have been used for identification purposes, much like fingerprints in humans, due to their unique characteristics in each animal. Furthermore, their consistency and appearance can provide clues about an animal’s overall health and well-being, with abnormalities potentially indicating underlying medical conditions.