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
On July 17, 1951 a one-year-old Guernsey heifer was admitted to the Stange Memorial Clinic. She was lame on the left front leg. Further examination of the affected leg revealed a fistultous opening on the lateral side of the claw just above the hoof. The owner suspected a foreign body, possibly a piece of glass, to be the causative factor.
Gamble, Robert E.
Iowa State University Veterinarian: Vol. 14
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol14/iss1/13