A fit horse has sufficient stamina, a strong, supple body and is energetic – qualities that are essential for training and competition. Make sure that your horse takes in energy corresponding to its needs. Provide sufficient concentrate feed if your horse is in hard work, but no more than necessary.
Moreover, do not confuse energy with stamina or temperament. A horse that is exhausted after just fifteen minutes does not have stamina. And “hot” horses can also have too little energy. Is your horse suddenly tiring much faster or seeming less active? Then look for what may be the cause.