An estimated 90 pig breeds and 200 pig varieties can now be recognized. Each rooster can recognize the crow of at least 30 other roosters. An average life span for a horse is around 20 -25 years, though they can live for up to 30 years. Old Billy who was foaled in 1760 and died in 1822. The world's horse population is estimated at 75,000,000.
Horses belong to the equus family.
Equus comes from the ancient Greek word meaning quickness. Horses are mammals in the same family as zebras, mules, and donkeys. Pigs generally have 44 teeth, including two enlarged canines in each jaw that grow upward and outward to form tusks. Cows moo' to each other fairly frequently allowing them to maintain contact even when they cannot see each other. Cows have 300 degree panoramic vision, much more than humans.