What is a negative impact of sudden changes in a horse's feed?

Sudden changes in a horse's feed can lead to digestive upset due to the horse's sensitive gastrointestinal system. Horses have evolved to graze continuously on forage, and their digestive systems are designed to handle gradual changes in diet. When the feed is changed abruptly—whether it be a new type of hay, grain, or supplements—the horse may struggle to adapt. This can result in issues such as colic, diarrhea, or changes in gut flora, which can all cause discomfort and health concerns.

In contrast, options like improved digestibility, increased energy levels, and enhanced temperament do not reflect the possible negative impacts of such dietary changes. Typically, these aspects may only improve with a gradual, well-planned transition rather than sudden alterations in the diet. Therefore, the likelihood of digestive upset is a critical concern when considering a horse’s feeding regimen.