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
Often cattle suffer extreme lameness when only one claw is affected and there is no involvement of the interphalangeal joints. many times the pain associated with these lesions may be so severe that the animal will not walk to a feed bunk or graze. This inevitably leads to costly weight losses in the feedlot and decreased milk production in the lactating animal. Some examples of these painful single claw afflictions include sole abscesses, nail or rock punctures, and other traumatic injuries.
Wilgenbusch, L. C. and Sexton, J. W.
"Handling Lameness in Cattle,"
Iowa State University Veterinarian: Vol. 33
, Article 9.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol33/iss3/9