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How to rid your horse of mud fever
Clean your horse's legs regularly.
Look at your horse's legs every day for any signs of irritation or scabbing. If you notice irritated skin or scabs, clean the legs with a good quality soap, like a chlorhexidine scrub preparation.
Rinse your horse's legs and apply enough of the chlorhexidine to cover the area. Gently wash the legs and rinse off the cleanser.