Horses differentiate between frustration and disappointment: study helps improve communication. Study from the University of Lincoln in Lincolnshire, England wanted to know exactly: Do horses show different facial expressions depending on whether they are happy or have negative feelings? Researchers filmed 31 horses - a stallion, several mares and geldings - between two and 23 years old.
The results clearly showed that the animals' facial expressions changed depending onWhether the horses were frustrated or disappointed. For example, they turn their head to the left when frustrated and raise their nostrils when disappointed.