Yep, there’s an official tool to identify if that horse is really stressed. Last year, researchers developed The Horse Grimace Scale,  grading 6 facial action units (FAU) to determine horse pain, including ear position, muscle tension around the eyes and nostril shape. Good horse-people read horses well, don’t they?  Just helps to have a scientific tool to confirm we’re not just making this stuff up! Now…is there a comparable Human Grimace Scale to gauge the Christmas shopper stress I saw in last week’s Black Friday cashier line -up??