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Secondary bloat or free gas bloat results from any condition that causes oesophageal obstruction or interferes with eructation. It usually affects a single animal in a group and generally has a more sporadic occurance.
Secondary bloat or free gas bloat results from any condition that causes oesophageal obstruction or interferes with eructation. It usually affects a single animal in a group and generally has a more sporadic occurance.
It may be '''acute''' in the case of sudden [[Oesophagus - Anatomy & Physiology|oesophageal]] obstruction, caused by a solid foreign body such as a potatoe or turnip, or '''chronic''' resulting from partial [[Oesophagus - Anatomy & Physiology|oesophageal]] obstruction/ compression, or from interference with the normal eructation mechanism.
It may be '''acute''' in the case of sudden [[Oesophagus - Anatomy & Physiology|oesophageal]] obstruction, caused by a foreign body such as a potatoe or turnip, or '''chronic''' resulting from partial [[Oesophagus - Anatomy & Physiology|oesophageal]] obstruction/ compression, or from interference with the normal eructation mechanism.
Causes of secondary bloat:
****** actinobacillosis in the oesophagus or [[Oesophageal groove|oesophageal groove]]
*Leisions of the [[Oesophagus - Anatomy & Physiology|oesophagus]] or [[Oesophageal groove|oesophageal groove]] such as tumours, abcessation or infection with ''Actinobacillous lignierii''.
*Chronic inflammatory or adhesive disease of the [[The Reticulum - Anatomy & Physiology|reticulum]]
****** chronic inflammatory or adhesive disease of the [[The Reticulum - Anatomy & Physiology|reticulum]]
***** Some passage of gas is possible, so gas build-up and distenesion is more prolonged.
***** Some passage of gas is possible, so gas build-up and distenesion is more prolonged.
***** Interference with cardiac and respiratory function is seldom life threatening.
***** Interference with cardiac and respiratory function is seldom life threatening.