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A foal is a young animal belonging to the horse family, typically under one year old. The term can refer to either a young male horse, known as a colt, or a young female horse, called a filly. The gestation period for horses is approximately 11 months. Foals can be susceptible to certain diseases, such as hemolytic anemia, which occurs when antibodies in the mare's milk destroy the foal's red blood cells due to blood type differences.12345

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