Each day, Bob Sheasley leaves Lilyfield Farm and heads into the city. And each day, he brings along a basket of eggs for his coworkers at The Philadelphia Inquirer. Depending on the breed of hen, these eggs may be white, green, rose, blue, or as brown as chocolate. And they are all deliciously fresh, a taste of the rural way of life that people have enjoyed for millennia, one in which chickens have played a supporting role for nearly as long. In Home...