Is There a Universal Distress Register for Animals?
animals, crying, cutting horses, distress, Dogs, emotional contagion, facial expressions, Freda Kreier, herd animals, human voice, humans, humming, Life Sciences, Natalia Albuquerque, neophobia, Neuroscience & Mind, Old Yeller, pigs, University of São Paulo, verbal abuse
Researchers decided to play recorded sounds of human crying and humming to both dogs and pet pigs. Source