Horses are herd animals, which in breeding practice translates into the operation of stud farms – specialised centres for the breeding and reproduction of these animals. The draught role of the horse has been replaced over time by breeding for recreational and sporting purposes. The use of probiotics in horse breeding helps to improve the digestibility of feed, its taste and smell, and reduces the occurrence of unfavourable microorganisms in the digestive tract. As a result, microbial preparations promote a better development of the desired gastrointestinal microflora, resulting in improved weight gain and nutrient absorption.