This bunch differs from bog spavin in that it is hard, while bog spavin is soft.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
It may occur on the back part of the leg above the fetlock or on the inner and fore part of the hock, corresponding in its location to windgalls and bog spavin of the horse.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
"'Yes, there's blood for you, said Charley Dycer, seeing my eye fixed on the wretched beast; 'equal to fifteen stone with any foxhounds; safe in all his paces, and warranted sound; except,' added he, in a whisper, 'a slight spavin in both hind legs, ring gone, and a little touched in the wind.
"The Confessions of Harry Lorrequer, Complete"
Charles James Lever (1806-1872)