Why the long face? Researchers compile directory of horse facial expressions

New study has identified 17 discrete expressions in horses (three more than chimpanzees) which may give researchers insight into their emotional states

A horse doesn't have to pull a long face, it has one already. But it can and does look down its nose at you. It can be insistent, if not a nag. Horses are expressive, but those who want to decipher their expressions have a few hurdles yet to jump.

But the chase is on. Scientists at the University of Sussex have compiled a directory of facial expression in one of humanity's oldest four-legged friends. Their Equine Facial Action Coding System (EquiFACS for short) has identified 17 discrete facial movements in horses that may indicate mood or intention or just bafflement.