Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
A spotted Shetland pony, 10 years of age, was brought to Stange Memorial Clinic on Aug. 12, 1950. This Shetland pony had engorged itself on corn in Sept. 1949. The front hooves had grown extremely long and were curved upward in such a manner that the bottom or walking surface of the shoe was parallel to the ground, but upside down. The pony was very lame and walking was awkward and painful.
Jensen, Loyd A.
"Extensive Growth of the Hooves of a Shetland,"
Iowa State University Veterinarian: Vol. 13
, Article 16.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol13/iss1/16