Inspection of the abdomen will show if there is any hernia.
"Boating"
W. B. Woodgate Commentator: Harvey Mason
The back is somewhat humped, arching at the waist-line, while the abdomen protrudes like a balloon, with a hernia, often, at the navel.
"The Glands Regulating Personality"
Louis Berman, M.D.
The animal lies down on the side where the hernia exists and stretches out his hind feet in a backward direction.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler