
1. There are between 19 and 25 billion chickens in the world, which is about three for every person.
2. Humans have been rearing chickens for at least 8,000 years.
3. The earliest domestic chickens were probably bred primarily for cock-fighting, not food.
4. The average hen can lay about 300 eggs a year.
5. The complete chicken genome was first sequenced in 2004. Genetic differences in strains of chicken are monitored by the International Chicken Genome Consortium.

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6. Roosters perform a dance called “tidbitting”, making food calls and moving their heads up and down to attract females.
7. Hens prefer males which have long wattles and can dance best.
8. There are more chickens in the world than any other species of bird.
9. Research has shown that chickens can distinguish between over 100 different faces of people or animals.
10. Alektorophobia is fear of chickens, though the fear does not generally apply to cooked chicken.