AMARILLO, Texas, April 5 -- People for the Ethical Treatment of Animals issued the following news release: Following the news that Cal-Maine Foods Inc. killed almost 2 million chickens at an egg factory in Parmer County due to a bird flu outbreak, PETA plans to place a sky-high warning near the plant, reminding everyone that slaughterhouses and filthy, severely crowded sheds where chickens are confined in the egg industry are breeding grounds for a host of deadly pathogens that can easily mutat  more