Animals can't tell us when they're in pain, so owners and veterinarians have to rely on other cues to help treat animals in discomfort. But determining that amount of pain might have just gotten easier: Researchers at the University of Cambridge used facial recognition software to figure out the amount of pain a sheep is in simply by looking at it.
When a sheep is hurting, it makes certain predictable facial expressions. It's so reliable, in fact, that scientists recently introduced the Sheep Pain Facial Expression Scale (SPFES) to easily determine the amount of pain a sheep feels. However, training humans to read these facial expressions and tics is time consuming; that's where the computer comes in.