Wheat middlings (commonly referred to as wheat midds) are a byproduct of wheat. It is what is remaining after most of the flour is extracted from wheat during miling. Wheat middlings contain higher levels of fiber, protein, and minerals then wheat grain with reduced amounts of starch and energy. They have a high phosphorus content, which will typically need to be offset with a calcium supplement if wheat middlings constitute a significant portion of the horse's diet. Wheat middlings are a popular ingredient in pelleted horse feeds.