The circle invites the observer to step inside the sacredness the cross represents, like a capsule of honor. Consider some well known objects that are circles. The planets, the sun, the moon, clock faces, many kinds of seeds, wheels, coins, rings and eyes just to name a few.
Feed Per Day. On average, a laying hen will require approximately 1/4 to 1/3 of a pound of feed every day, or roughly 1.5 pounds of feed per week according to Nutrena Feeds. At this rate of consumption, every hen you have will require slightly less than 10 pounds of feed each month, regardless of whether or not she is actively producing any eggs.
I would say that there are between 3 and 4 chickens per human at any given moment. this is purely speculation but working backwords from population of humans, intake of eggs per day per human plus the number of chickens per human, humans eat; i would have to say that is a fair quick estimate....