You may notice that the cow has a poor appetite, is somewhat depressed, and is reluctant to move. Cattle seem to have indigestion and show signs of pain when defecating.
If perforation of the heart has occurred, fluid, due to infection, may accumulate around the heart and produce abnormal heart sounds. The brisket may be quite flabby due to a large amount of fluid in it.
The cow may also be bloated. These symptoms may subside or disappear within one to seven days, but may reoccur shortly afterwards.
If the cow is slaughtered and the reticulum and heart carefully examined, it may be possible to find a nail or wire protruding through the wall of the reticulum into the heart. However, the hardware may have been completely digested over a period of months and thus not be present.
Sometimes abscesses or adhesion's may be present between the reticulum and diaphragm, indicating a perforation had been present. Normally, the reticulum and diaphragm are not bound to one another.