(AP) — This Sept. 10, 2008, file photo shows chickens huddling in their cages at an egg processing plant at the Dwight Bell Farm in Atwater, Calif.
The future of state laws that regulate everything from the size of a hen’s cage to safe consumption of Gulf oysters may be at stake as farm bill negotiators work to resolve a long-simmering fight between agriculture and animal welfare interests.(AP Photo/Marcio Jose Sanchez File)