Is it safe to use horse weight gainer?

The use of horse weight gainer supplements should be discussed with a veterinarian who is familiar with the individual horse's health and nutritional needs. Some weight gainer supplements may contain ingredients that are not safe or appropriate for horses, such as high levels of sugar or starch, or ingredients that can interfere with the horse's metabolism or digestive system. Additionally, some weight gainer supplements may not provide the necessary nutrients that a horse needs for overall health and well-being. It is always best to consult with a veterinarian before giving any supplements to your horse.