Changes

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* Due to their unselective feeding habits, cattle may injest a variety of foreign bodies.

** Heavier metallic objects consumed become lodged in the [[The Reticulum - Anatomy & Physiology|reticulum]], and may penetrate the reticular wall under the influence of the continuous [[The Reticulum - Anatomy & Physiology#Ruminoreticular contraction|reticular movements]].  

Due to their unselective feeding habits, cattle may injest a variety of foreign bodies. Heavier metallic objects consumed can become lodged in the [[The Reticulum - Anatomy & Physiology|reticulum]], and may penetrate the reticular wall under the influence of the continuous [[The Reticulum - Anatomy & Physiology#Ruminoreticular contraction|reticular movements]].

Perforation of the wall of the reticulum allows leakage of ingesta and bacteria, which contaminates the peritoneal cavity and causes peritonitis. The foreign object may also penetrate the pericardial sac causing pericarditis or may penetrate the diaphragm and enter the thoracic cavity and cause pleuritis.  

====Clinical====

==Signalment==

 

==Diagnosis==

* Signs are often vague, but adult cattle show abdominal pain with hunched backs and grunting on the "bar test".

Signs are often vague, but adult cattle show abdominal pain with hunched backs and grunting on the "bar test".

====Pathogenesis====

====Pathogenesis====