Lincoln Trypto-MAG Calmer is designed to help nervous, sensitive, spooky horses and ponies to remain calm when facing stressful situations. Comes in an easy to administer syringe. Feeding Guidelines Syringe orally 2.5 hours before needed. Ponies under 300kg: Feed 30 - 60g. Horses 300-600kg: Feed 60-120g. Whats in it Contains Tryptophan; a precursor to the calming neurostransmitter Serotonin, Magnesium and a combination of B Vitamins. Size Guide Available in a 80g tube.