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
Late one hot afternoon, two dogs were presented at the hospital of Dr. M. C. Hawn of Fargo, N. Dak., to receive treatment for "fits." One dog was a four year old male fox terrier with no history of any previous disease. The owner stated that the dog had been tied in the sun all morning.
Graham, J. A.
"Two Cases of Sunstroke in Dogs,"
Iowa State University Veterinarian: Vol. 4
, Article 10.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol4/iss2/10