Hair ball and intestinal concretion

Hair ball
Hair balls are composed of hairs or plant fibers swallowed by ruminants such as cattle, sheep, and goats. They are observed in the first stomach and the second stomach of ruminants or rarely in the stomach and intestine of swine and dogs. Hair balls showing hairs on their surface are called coarse hair balls and hard smooth hair balls covered with inorganic salts are called smooth hair balls.

Intestinal concretion
This condition is caused by deposition of inorganic substances in foreign materials such as small stones, nails, wire, and buttons contained in stools and is primarily observed in the large intestine, especially the colon of horse.

Masanobu Goryo
Address inquiries to the following.
Department of Veterinary Pathology, Faculty of Agriculture, Iwate University., Morioka, 020-8550, Japan