Palmar Foot Pain in Horses: Navicular Syndrome and Heel Pain Welfare

Palmar foot pain — encompassing navicular syndrome and related heel pain conditions — is one of the most common causes of forelimb lameness in horses. Understanding the condition helps owners and trainers make welfare-centred management decisions.

Key Facts

Palmar foot pain (PFP) encompasses a group of conditions causing pain in the back portion of the horse's hoof, including navicular syndrome, navicular disease, deep digital flexor tendon pathology, and impar ligament damage
MRI has revolutionised diagnosis, revealing that "navicular syndrome" is heterogeneous — affected horses have varying combinations of bone, tendon, bursa, and ligament lesions
Warmblood sport horses, Thoroughbreds, and Quarter Horses are most commonly affected, often in middle age (7-14 years), though any breed can be affected
Conformational risk factors include small hooves relative to body mass, upright pastern angles, and contraction of the heels — often exacerbated by poor farriery
The navicular bone sits within the hoof capsule and acts as a pulley for the deep digital flexor tendon; any inflammatory change in adjacent structures causes pain with every footfall
Early signs include subtle forelimb lameness, a shortened anterior phase of stride (horses "point" their toes rather than landing heel-first), and performance reluctance
Bisphosphonates (tiludronate, clodronate) have shown efficacy in reducing bone remodelling and pain in some horses with navicular bone pathology
Without appropriate management, affected horses face progressive pain and career-limiting or career-ending lameness

Welfare Considerations

Palmar foot pain is particularly insidious because horses are stoic animals who often continue working despite significant discomfort, masking the degree of their suffering. The condition causes pain with virtually every step — horses with PFP cannot escape their discomfort, as weight-bearing on affected limbs is unavoidable. Horses trained or competed through early or moderate PFP without adequate pain control experience prolonged welfare compromise. Shoeing plays a central role in welfare management: appropriate remedial shoeing (egg bar shoes, wedge pads, wide-webbed shoes) to reduce pressure on navicular structures and encourage heel-first landing can dramatically reduce pain. Conversely, inappropriate or neglectful farriery — particularly long toes, underrun heels, and excessive shoe-nailing — can precipitate or worsen the condition. The welfare question of when to retire, box rest, or euthanase horses with advanced PFP requires honest assessment and must prioritise the animal's pain experience over competitive or financial considerations.

What You Can Do

Ensure regular, skilled farriery every 6-8 weeks with attention to hoof balance, heel height, and toe length — poor trimming practice is a major risk factor for navicular problems
Seek a precise diagnosis via MRI if possible, as different lesion types respond to different treatments — treating the wrong pathology wastes time and prolongs suffering
Discuss bisphosphonate therapy with your vet for horses with confirmed navicular bone pathology; these treatments can provide sustained pain relief
Manage affected horses on appropriate surfaces — deep, yielding ground reduces concussive forces; hard, unyielding surfaces worsen heel pain
Consider regular turnout on suitable ground to encourage natural movement and promote circulation to the foot, rather than prolonged stabling
Be honest about pain levels and prognosis: horses in persistent uncontrolled palmar foot pain despite maximal management deserve humane euthanasia rather than continued suffering