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
July 2, 1947, a black Quarter Horse gelding, age 6 years, was presented at the Stange Memorial Clinic with a scar formation on the dorsal surface of the right rear metatarsus. The owner suspected a sequestrum or a foreign body in this region, but an X-ray of the area revealed a chronic ostitis of the third metatarsal bone. A considerable amount of scar tissue was present on the skin over this area. No lameness was observed and there was no history of a previous lameness. The owner was advised that any treatment would be likely to excite the condition. Being a roping and bulldogging horse, the blemish was not detrimental to the value of the animal. The patient was discharged the same day.
Neumann, A. and Skewes, Art
"Sulfa-Penicillin Therapy in an Open Joint,"
Iowa State University Veterinarian: Vol. 10
, Article 11.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol10/iss2/11