Some types of gastrointestinal disturbances are more likely during certain seasons. In spring, gas is the usual culprit of gastrointestinal disturbances. Gas colic develops when a horse ingests forage that is high in sugar, usually lush spring grass. Excessive fermentation then occurs in the gut, which creates a buildup of gas.
Source: Equus, April 2015.
Although gas colic may clear on its own, don’t take a wait-and-see approach. A gas-filled intestine can twist on itself, leading to a torsion that requires immediate surgery. Call your veterinarian at the first sign of colic.