Bird flu drives free-range hens indoors to protect poultry in Pennsylvania and other states
Bird flu cases have been identified in commercial chicken and turkey farms or in backyard flocks in the commonwealth and 28 other states.
Avian influenza is very rarely transmitted by birds to people, but infected poultry have to be put down to stop the spread.
The Environmental Integrity Project’s analysis estimates that about 1 million more pounds of nitrogen pollution are entering the Chesapeake Bay each year from the poultry industry than state and federal cleanup programs estimate.