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 Oct. 18, 1946, a I 1J2-year-old male crossbred Cocker Spaniel entered the Stange Memorial Clinic. The owner reported the history that the dog had been slightly depressed and had demonstrated vomition and anorexia for the previous 2 days. The patient was examined and a tentative diagnosis of gastritis was made.
Fistler, R. P.
"Black Tongue in a Dog,"
Iowa State University Veterinarian: Vol. 9
, Article 12.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol9/iss1/12