Abdominal circumference increases rapidly, and there are abdominal pain symptoms such as wagging your tail and kicking your stomach, looking back at your abdomen and being uneasy. The left gastric protrusion can exceed the back, and the percussion is drums, which develop seriously with abdominal distension. The condition deteriorates rapidly, breathing is highly difficult, the heart rate reaches more than 120 times per minute, the mucous membrane is cyanotic, the veins on the body surface are congested and swollen, the eyeball is prominent, the whole body sweats, and it is unstable to stand, and it can suddenly fall to the ground and twitch and die. The course of disease is short, 1 ~ 2 hours may lead to suffocation and death. If the rescue is timely, the prognosis is good.
(2) Prevention
When the gastric tube is inserted to discharge gas, which is life-threatening, rumen puncture and deflation should be performed immediately. Oral hypoglycemic agents and small doses of laxatives. The critically ill cows were treated with cardiotonic and central nervous system stimulants, namely intravenous injection 1.5 ~ 2.5 mg, intramuscular injection of caffeine sodium 2 ~ 4 g and intramuscular injection of nikethamide 2.5 ~ 5 g.
Rumen gas is foam gas, so methyl silicone oil, ethylene oxide ricinoleate or turpentine and liquid paraffin should be taken orally first.
Avoid eating too much green leguminous grass; Don't feed fermented and rotten feed; Avoid grazing on dew or frost grass in the morning; There should be a transitional adaptation stage for changing feed.