Nutritional Needs for Mares in Late Gestation

Breeders with mares in late gestation need to remember that the mothers-to-be have different nutritional needs than open (nonpregnant) mares. In the last 90 days of pregnancy, fetal growth increases the mare’s energy requirements. Since grain mixes typically have more digestible energy per pound than pastures or grass hay


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Breeders with mares in late gestation need to remember that the mothers-to-be have different nutritional needs than open (nonpregnant) mares.

"A pregnant mare's nutrient requirements are slightly higher because she is maintaining not only her bodily needs but also is supplying nutrients to a growing fetus," said Dave Freeman, PhD, Oklahoma State University Cooperative Extension equine specialist.

In the last 90 days of pregnancy, fetal growth increases the mare's energy requirements. Since grain mixes typically have more digestible energy per pound than pastures or grass hay, Freeman suggests increasing the amount of grain fed per day.

"This increased energy demand is met usually by simply increasing the daily allotment of grain by a few pounds per day for mares weighing in the 1,000 to 1,200-pound range," Freeman said. He added that, "It's important for a mare to remain in fleshy condition if she is to be rebred following foaling

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