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Mares carry their young (called foals) for approximately 11 months from conception to birth. (Average range 320–370 days.) [2] Usually just one young is born; twins are rare. When a domesticated mare foals, she nurses the foal for at least four to six months before it is weaned, though mares in the wild may allow a foal to nurse for up to a year.
A stallion mating with a mare. While horses in the wild mate and foal in mid to late spring, in the case of horses domestically bred for competitive purposes, especially horse racing, it is desirable that they be born as close to January 1 in the northern hemisphere or August 1 in the southern hemisphere as possible, [11] so as to be at an ...
A foal at about weaning age. A foal is an equine up to one year old; this term is used mainly for horses, but can be used for donkeys. More specific terms are colt for a male foal and filly for a female foal, and are used until the horse is three or four. When the foal is nursing from its dam (mother), it may also be called a "suckling".
Bigger eggs mean bigger young that have a higher survivability rate. [18] In a study of zebra finches, it was determined that those which were fed a lower quality diet laid eggs that were lighter and less nutrient-rich than those zebra finches which were fed a higher quality diet.
Neonatal maladjustment syndrome (NMS) is a syndrome where newborn foals exhibit uncommon behaviors, occurring in three to five percent of live births. These behaviors can include aimless wandering, hypersensitivity to loud sounds and brightness, weakness or coordination issues, and the incapability to nurse.
Mare reproductive loss syndrome (MRLS) is a syndrome consisting of equine abortions and three related nonreproductive syndromes which occur in horses of all breeds, sexes, and ages. MRLS was first observed in the U.S. state of Kentucky in a three-week period around May 5, 2001, when about 20–30% of Kentucky's pregnant mares suffered abortions.
Serena's Song (foaled April 4, 1992) is an American Thoroughbred race horse. She won 17 graded stakes races, including 11 Grade I (some against males and older mares), in three seasons for $3,286,388 in earnings.
Wild horses were further targeted because they caused damage to hay stores and often took domestic mares from pastures. Furthermore, interbreeding with wild horses was an economic loss for farmers since the foals of such matings were intractable. [further explanation needed] [16] Tarpans lived in the southern parts of the steppe.