1. There are now 200 breeds of chickens.
2. An average hen lays 300 to 325 eggs a year.
3. A hen starts laying eggs at 19 weeks of age.
4. A hen must eat four pounds of feed to make a dozen eggs.
5. Occasionally, a hen will produce double-yoked eggs throughout her egg-laying career.
6. As a hen grows older she produces larger eggs.
7. The mother hen turns over her egg about fifty times per day so the yolk won't stick to the sides of the shell.