Rekor Oestracalm Liquid Supplement For Mares 1lSome mares can be difficult to work with due to an imbalance in their ovarian cycle Oestra'calm Rekor helps focus mares' attention and reduce irritability Composition: anhydrous magnesium sulfate, magnesium chloride, aromatic substances (turmeric, green apple flavour) Directions for use: administer 20 ml morning and evening for 10 days per month. An initial course of 21 days may be required, followed by a 21 day break, then resume at 10 days per month.