WASHINGTON, April 4 (TNSres) -- The Food and Water Watch issued the following news release: * * * 75% of U.S. egg-laying hens are raised on just 347 factory farms, ideal breeding grounds for disease * * * The most recent bird flu outbreak at a Cal-Maine factory egg farm in Texas highlights rising concern for public health, as well as consumer cost impacts. Cal-Maine, the nation's largest egg producer, culled 1.6 million laying hens (3.6% of its total flock). This follows reports of bird flu   more