I'm sorry to hear about your horse. Since I was not familiar with Navicular Disease, I went online to look it up. You didn't say how your vet came to his conclusion, so I thought I would point you to this article from UC Davis Vet School. It might prove helpful. http://www.vetmed.ucdavis.edu/CEH/pu...-3-bkm-sec.pdf The Navicular article starts on page 8. Wishing you success in dealing with this difficult issue.