Description: - Dyna-Pro is a biological feed additive designed to maximize digestive efficiency. Physical and psychological stress caused by travel, competition, breeding or treatment with antibiotics and some of the antiparasite products can dramatically disrupt a horse's metabolism by destroying or depleting the beneficial intestinal bacteria. These bacteria must produce all the enzymes necessary to convert feed into a form that the horse can use. The bacteria (microbes) also assist in vitamin production and help prevent harmful bacteria from entering and multiplying in the digestive tract. While other probiotic formulas on the market merely add one or more strains of beneficial bacteria, Dyna-Pro uses a fermentation extract which nourishes the natural bacteria and encourages them to reproduce and multiply.