With three monkey-breeding facilities and a fourth in development, rural Hendry County has become one of the country's biggest suppliers of research primates.

This has some neighbors and many animal rights activists howling.

The Animal Legal Defense Fund has filed suit against the county, saying that officials didn't follow the state's Sunshine Law when it approved one of the facilities under an agricultural zoning designation.

Hendry County officials have launched an investigation into two of the facilities.

Officials want the companies to explain what they do with the "nonhuman primates" on the property, and whether they perform research, tests or experiments on the animals.