For those in Eastern Australia who would like to know how they can tell if their horse has equine influenza - here is a video from the Qld DPI website. The main clinical signs of equine influenza are usually a sudden increase in temperature (to between 39°c and 41°c); a deep, dry, hacking cough; and a watery nasal discharge, which may later become thick and smelly. Other signs can include depression, loss of appetite, laboured breathing, and muscle pain and stiffness. Few adult horses die of ...