Mare Plus Gestation & Lactation Supplement is a comprehensive nutritional supplement to help keep mares in optimal condition during all stages of breeding. Rich in vitamins A and E to augment those found in the mare's natural diet and help meet her nutritional requirements. Formulated with a balanced calcium:phosphorous ratio, plus, added protein, amino acids, folic acid and vitamin E to replace the nutrients in the mare's diet that she is providing to her unborn foal. Designed for fast assimilation by the mare to supplement her diet and meet the vitamin-mineral requirements of the nursing foal.