Equine podiatry

Solar bruising & corns

Dr. F T├│th notes

Definitions

Solar bruising : Contusion caused by impact – results in hemorrhage of the solar corium. Often a “corn”

Corn: solar bruising located in the medial angle of the sole

Etiology

Bruising is typically caused by:

  • Shoe that is too small or does not extend far enough back under heels (corns)
  • Long-toe/low-heel conformation (toe-bruising as horse tends to land on toe)
  • Flat and/or thin-soled feet
  • Riding on a hard or rocky ground
  • Foot that has overgrown its shoe- shoe rides on sole
    shoe does not extend far enough back
    shoe is too small

     

 

 

 

Clinical signs and diagnostic tests

Lameness varies. It can be acute and severe or chronic and mild. Bruising often affects several feet. If both front feet are affected, it can resemble laminitis. Lameness may worsen when the shoe is removed.

Increased digital pulses are often present. Discoloration of the sole (bruise) may be evident on unpigmented feet or if the bruise is deep. The horse will typically be positive on hoof tester examination in the bruised area.

Lameness should be improved after palmar digital nerve anesthesia.

Treatment

  • Phenylbutazone or other NSAIDs
  • Eliminate shoeing problems (replace a small shoe, etc)
  • Apply caustic agent to toughen sole, such as iodine, formalin, or phenol (i.e., sole paint)
  • Apply a pad until the sole can toughen
  • Apply a wide-web shoe to support the foot

Key Takeaways

Corns are sole bruises at the medial angle of the sole.

  • These are usually due to a poor fitting shoe (too long between resets).
  • Bilateral lesions are common
  • Treat with NSAIDs, hoof tougheners and better fitting shoes

Resources

Remedial shoes – Horse and Hound

Corns in Horses– VCA

License

Icon for the Creative Commons Attribution-NonCommercial 4.0 International License

Large Animal Surgery - Supplemental Notes by Erin Malone, DVM, PhD; Elaine Norton, DVM PhD; Erica Dobbs, DVM; and Ashley Ezzo, DVM is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, except where otherwise noted.