Continual change between wet and dry can lead to hoof cracks (just like our hands get chapped after being continually in and out of water). “This opens up the foot to microbes that can cause subsolar abscesses, white line disease, thrush, canker, etc.,” Burns said. “A strong, healthy hoof surface is the best defense against these invaders.”
Just as mud is the enemy of hoof health, so is frequent bathing. “Many people hose down the horse after a race or workout, getting the feet wet, then put the horse in a clean, dry stall where the foot dries out and shrinks,” he explained. “With these cyclic events the foot is constantly expanding (when wet) and shrinking as it dries. This leads to microcracks and fissures, which allow opportunistic microbes to invade.”
Even show horses in perfectly clean environments can develop hoof problems from continual bathing. “Clinches pop, the shoes come loose, their hooves crack,” Burns said. “We recommend applying a hoof sealant to the feet, allowing it to dry before you bathe the horse.” This makes the hoof temporarily waterproof and keeps it from absorbing so much moisture.
“This is much more effective than hosing the feet and then painting a sealant on after they are already wet,” he added. “Before you bathe the horse, you should pick out the feet, use a wire brush to get them clean, paint the sealant on, and let it dry—and then bathe the horse. It is remarkable, the difference this will make.”