Animal feed additive for use as a nutritional supplement for medical purposes; animal feed supplements; medicated animal feed; nutritional additives for livestock feed for medical purposes; nutritional additives to foodstuffs for animals, for medical purposes; veterinary preparations for dogs and horses for treatment and prevention of vitamin, mineral, iron, calcium, and phosophorous deficiencies in horses, for treatment and prevention of electrolyte loss through acidosis, heat exhaustion, cramp, fatigue, gastroenteritis, diarrhoea and/or dehydration in horses and dogs, for treatment of acid build up in blood streams of horses and dogs, for treatment of cough associated with colds and flu in animals, for protection against free radicals reducing muscle strengh in horses and dogs, for treatment against hoof damage and deterioration in horses and the promotion of thicker, harder and more resilient hoof walls in horses, for the treatment and prevention of Vitamin B and magnesium deficiencies in horses, and for the treatment and prevention of iron deficiency anaemia in horses; vitamin and mineral supplements for veterinary uses