Understanding traumatic reticulitis (hardware disease) in cattle — prevention through magnet use.
Hardware disease causes acute abdominal pain from metallic foreign body penetration of the reticulum. Affected cattle adopt a characteristic posture — reluctant to move, arched back, grunting on rising or descending slopes, and elbows abducted. The pain of reticulum puncture is severe and constant, causing significant welfare impairment that progressively worsens as peritonitis develops.
Complications dramatically worsen welfare outcomes. Metal objects that penetrate the reticulum anteriorly may enter the pericardium — causing traumatic pericarditis, the classic 'washing machine' heart sounds, and fatal cardiac tamponade. Peritonitis from reticulum puncture causes systemic illness, chronic pain, and progressive deterioration.
Prevention through routine rumen magnet administration is highly effective and inexpensive. A single magnet placed in the reticulum attracts and retains metal fragments before they can penetrate. Magnets should be given to all adult cattle that have not previously received one. Checking magnetic load at slaughter allows monitoring of environmental metal contamination.