copper sulfate for hoof with thrush

When thrush has gotten deep into the central sulcus of a frog, pushing cotton balls soaked with a topical treatment into the area may be effective. Copper sulfate is being used here by the late Red Renchin, a member of the International Horseshoeing Hall of Fame from Mequon, Wis.

Dealing with Thrush and White Line Disease

Combining topical treatments with good hoof care will help you keep these common problems under control

Article last updated: March 30, 2021

Among the most common problems farriers deal with are thrush and white line disease. Thrush, affecting the sulci of the frog and sometime deeper tissues, is generally caused by bacteria. The most common culprit is fusobacterium necrophorum, which causes a variety of diseases, including navel ill/joint ill in foals, diphtheria in calves and foot rot in cattle.

White line disease (WLD) affects the middle and thickest layer of the hoof wall — the stratum medium — between the outer hoof wall and the insensitive laminae (also called the stratum internum). This disease is caused by keratin-digesting fungi, which enter the hoof through a separation in the hoof wall.

WLD generally starts at the bottom and eats its way upward, creating a separation of the hoof wall and hollow areas between the layers. There are several types of fungi that have been implicated. Treatment consists of opening the damaged area and trimming away all the diseased horn tissue, then treating with a product to kill the fungi.

A number of antiseptics and caustic products have been used over the years for treating thrush and/or WLD. Some are still in use and new products also have been developed.

Treatments For Thrush

Prevention is the best treatment for thrush. Keeping the horse in a dry, clean environment is best, but in some climates and circumstances, this is hard to do. It helps if the horse can be exercised regularly so feet can have proper blood…

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Heather Smith Thomas

Heather Smith Thomas is a freelance writer based in Salmon, Idaho. She has been writing books and articles for nearly 50 years.

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