Knuckling unders refers to a term commonly used in the context of horse health and equine podiatry. It is a condition where a horse's fetlock joint collapses, causing the pastern to drop lower than normal and the hoof to slope excessively towards the toe. This results in the horse's toes striking the ground first during movement, rather than the heel, which can lead to various complications and lameness issues.
The term "knuckling unders" is derived from the visual appearance of the affected limb, whereby the fetlock joint resembles a knuckle bending inwards and the limb appears "under" the normal alignment. The condition can occur in one or both forelimbs, and it typically affects young horses during their early growth stages. It is most commonly associated with genetic predisposition, poor conformation, or improper growth and development.
Knuckling unders can impede a horse's normal range of motion and balance, putting excessive strain on tendons, ligaments, and joints. Over time, this uneven distribution of weight can lead to injuries, such as tendonitis, joint inflammation, and even irreversible damage if left untreated.
Efficient equine hoof care, proper trimming, and appropriate exercise to strengthen the weakened limb can play a crucial role in managing knuckling unders. In some cases, therapeutic shoeing or the use of corrective devices may be recommended to help realign the limb and provide necessary support.
It is important for horse owners, trainers, and veterinarians to recognize the signs of knuckling unders early on and seek professional advice to prevent further complications and ensure the horse's well-being and soundness.
