Changes

* While some may pass through posing no problems, others can cause acute obstruction,

* While some may pass through posing no problems, others can cause acute obstruction,

* Quite common in dogs

* Quite common in dogs

** Rare in other species - tend to lodge in the oesophagus or in one of the ruminant [[Stomach and Abomasum - Anatomy & Physiology|stomachs]].)

** Rare in other species - tend to lodge in the oesophagus or in one of the ruminant [[Ruminant Stomach - Anatomy & Physiology|stomachs]].)

** Enteroliths can be seen in  horses greater than 4 years of age.

** Enteroliths can be seen in  horses greater than 4 years of age.

*** Are stones consisting of magnesium ammonium phosphate around a central nidus (often a metallic foreign body)  

*** Are stones consisting of magnesium ammonium phosphate around a central nidus (often a metallic foreign body)