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 January 27, 1947, a female German Police dog, age 5 years, was admitted to Stange Memorial Clinic. She had previously been treated by 2 veterinarians for pleurisy and bronchitis. An accompanying letter from one of the veterinarians stated that she had shown some improvement, but she would not eat and she had a persistent dyspnea.
"Chronic Proliferative Endocarditis.,"
Iowa State University Veterinarian: Vol. 9
, Article 10.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol9/iss3/10