Seems to me that there are many whose horses are suffering with abscessed hooves. Or, abscesses elsewhere on the body. Below is an excerpt from
http://www.thepenzancehorse.com/ARTICLES/Myristica%20Sebifera.pdf
Summary of Indications:
1. Hastens suppuration and cuts short the duration of an abscess. It is more powerful than Hepar Sulfur or Silica.
2. Indicated for inflammation of finger nails, inflammation of the middle ear when pus has formed, fistula with pus, etc.Myristica Sebifera is a remedy of great antiseptic powers and one of the most efficacious remedies for ulcerative and suppurative conditions in every tissue, especially in cellular tissue and periosteum. It hastens the process of suppuration and shortens the period. The pain during the inflammatory and suppurative stage is generally removed within 24 hours.
READ MORE: http://www.thepenzancehorse.com/ARTICLES/Myristica%20Sebifera.pdf