The panthers of Florida are struggling to walk and no one knows why.

A mysterious state of the brain can make some marches difficult for some panthers of the American state of Florida.

Images published by the state conservation commission show animals struggling to coordinate their movements.

Gil McRae, director of the Wildlife Research Institute of the Florida Wildlife Commission, said: "Many diseases and their possible causes have been ruled out; no definitive cause does not exist. has been determined yet ".