Designed to be fed to horses and ponies with anxious temperaments, particularly those that cannot cope with stressful situations. Not all horses are anxious for the same reason so TopSpec Calmer has been developed with much more than a 'single ingredient' approach. It contains yeast, MOS, B vitamins, magnesium, tryptophan and sepiolite clay, which all act in different ways to help calm and relax responsive horses. Reduces anxiety without affecting non-anxious behaviour or presence. It will start to take effect within hours but maximum effects will be seen within three weeks. TopSpec Calmer is a very palatable, apple-flavoured additive that should be mixed into damp feed. Contains only natural ingredients but no herbs. Suitable for horses competing under FEI and Jockey Club rules.