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
The owner of a mature female red-tailed hawk telephoned the College of Veterinary Medicine, Iowa State University and described the bird's symptoms, including frequent regurgitation of food over a three week period, and gradual weight loss.
"Exotic Case History,"
Iowa State University Veterinarian: Vol. 37
, Article 2.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol37/iss3/2