Depending on your horse's condition and whether it needs more support in winter due to, for example, "susceptibility to cold, damp weather" , a treatment of 1 to 2 kg for one to two months definitely makes sense. It is best to discuss details with your local veterinarian or nutritionist . We cannot provide individual feeding advice from a distance. Unfortunately, we don't know your horse and its basic care, training intensity, health status, etc.