Q: Have any studies proven the efficacy of Epsom salt soaks and/or application of poultices in the treatment of abscessed hooves? Is there any proof that these treatments improve and/or speed healing?

—Ann L’Italien, Gilmanton Iron Works, NH

A: As with many aspects of the horse management, treatments we use on hoof abscesses are heaped in tradition. Furthermore, I believe we should question the traditional treatment of soaking the foot when an abscess is suspected. There are no scientific studies verifying the efficacy of using Epsom salt (magnesium sulfate) soaks to treat a hoof abscess. Submural (in the wall) or subsolar (under the sole) abscesses require drainage to resolve. However, Epsom salt, when saturated, has hygroscopic (water absorbing) properties. From a clinical impression, once drainage is established, the application of an Epsom salt soak might promote drainage from the tract. Before drainage is established, Epsom salt soaks or any other type of poultice will do little more than soften the hoof capsule.