Dozen chickens

If I lived 2000 years ago I would own a dozen chickens over a cow or a horse because I could breed them, their not to much work, I could have eggs, and I could have chicken. I could also sell the chickens, the chicken, the eggs, and the feathers. I could buy a cow, a horse, or both with the money I make from selling my chickens and there produce. That is why I would want a dozen chickens instead of a cow or a horse.