The Mexican government is battling an egg shortage and hoarding that have caused prices to spike in a country with the highest per-capita egg consumption on Earth. A summer epidemic of bird flu in the heart of Mexico's egg industry has doubled the cost of a kilo (2.2 pounds), or about 13 eggs, to more than 40 pesos ($3), a major blow to working- and middle-class consumers in a country that consumes more than 350 eggs per person each year. That's 100 more eggs per person than in the United States. Egg prices have dominated the headlines here for a...