By Hannah Dyball
The gut is one of the horse’s most delicate internal systems and is easily agitated by food, parasites, stress, bacteria and stomach acid. The latter is responsible for the majority of all stomach ulcers but is not the sole cause. Unlike the human stomach which is stimulated to produce hydrochloric acid only when we eat food, the horse’s stomach produces it continually, causing problems if left unabsorbed. Because horses have evolved to graze near enough constantly, stomach acid has always played an important role in the digestive process.