Thrush Prevention

Thrush is one of the more common diseases of the equine hoof. But how do you prevent it, or how do you treat it once it has set up shop within your horse’s hooves?
Please login

No account yet? Register


Thrush Prevention
Every time you groom your horse or before every ride, you should pick out the feet. Don’t forget to clean the frog and the sulci–don’t just remove the shavings or dirt trapped in the sole. | Photo: iStock
Thrush is a very common word for those of us who have been spent any amount of time around horses. It is one of the more common diseases of the equine hoof. But does everyone know what thrush is? How do you prevent it, or how do you treat it once it has set up shop within your horse’s hooves?

Thrush is a disease of the foot that usually occurs within the frog (the wedge-shaped structure on the bottom surface of the foot) and its sulci (the grooves next to and in the middle of the frog). The disease is characterized by a very soft frog and sulci. When the frog is picked out, a thick, black discharge is present that is easily removed from the sulci. There also is a characteristically pungent odor. Once smelled, it will never be forgotten, and you have your diagnosis.

The disease is thought to be caused by a bacterium. Usually thrush does not cause lameness if the disease stays in the superficial external and non-sensitive area of the frog. However, if left unchecked, the disease can extend into the sensitive tissue of the frog and make horses quite sore. They might flinch as you clean the sulci. Thrush can progress to a severe lameness that can be seen at a walk–much like a hoof abscess. The infection in general leads to degeneration of the frog. Thrush also can cause enough degeneration of the frog that portions of that structure have to be removed by your veterinarian or farrier.

Thrush is most commonly associated with poor management practices or conditions. It can be seen in horses which are allowed to stand in paddocks or stalls that are full of wet manure, or just in horses which do not regularly have their feet cleaned. However, this disease is also seen in horses which are never allowed to stand in manure

Create a free account with to view this content. is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into

Start your free account today!

Already have an account?
and continue reading.


Written by:

Christina S. Cable, DVM, Dipl. ACVS, owns Early Winter Equine in Lansing, New York. The practice focuses on primary care of mares and foals and performance horse problems.

Related Articles

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Sponsored Content

Weekly Poll

sponsored by:

What signs does your horse show when he has gastric ulcers? Please check all that apply.
45 votes · 102 answers

Readers’ Most Popular

Sign In

Don’t have an account? Register for a FREE account here.

Need to update your account?

You need to be logged in to fill out this form

Create a free account with!