Nettex Calmer Maintenance Powder helps reduce stress related symptoms in horses. Contains highly bioavailable chelated magnesium to maintain levels to give long lasting effectiveness. Encourages well-being and concentration and can be fed to horses and ponies to help reduce stress related symptoms such as nervousness, excitability, apprehension and irritability. Feeding guidelinesPonies up to 14. 2hh: Feed 20g per day. Horses up to 15hh: Feed 25g per day. Large horses over 15hh: Feed 30g per day. For faster results feed double the rate for 5 days. Mix daily with feed. A level (20ml) scoop dispenses approximately 15g.