Skip to content
  • Print


Thrush is a fungal infection that can affect the sole, frog and bulbs of the heels, especially under wet, anaerobic (low oxygen) conditions.

Signs include heat and lameness caused by frog and heel infection. Often, a black, smelly discharge weeps from around the frog.

What can you do to help?

Thrush can be avoided by daily picking out of the grooves (sulci) of the frog and painting with antiseptic solution as necessary. You can also apply a commercial hoof sealant to maintain optimum moisture content in the frog environment. Consult your vet if the condition persists or recurs.


  • Because thrush is a fungal microbe, the moist, anaerobic (low oxygen) conditions of wet or highly contaminated bedding and outside yards will help perpetuate the infection. Regularly “muck out” the stable and replace bedding with dry bedding. 

Adapted from Common Hoof Problems from the website

Reproduced courtesy of the author, Dr John Kohnke BVSc RDA.