 And so if you've got a horse that's acting colicky, all it really means is his stomach is painful. But there's quite a few reasons why a horse's stomach might be painful. So it could be what we call a gas colic, where there's a big gas bubble that's distending the abdomen and causing pain. It could be a colic from an overload of worms. It could be an impaction colic, where there's actually something is lodged in the intestine, usually just dried feces. Or the colic can be