37.2 Here are some facts about animals. Which idioms are based on them? 1 When you ride a horse, it has a bit in its mouth, which is a metal bar that helps you control the horse. 2 A bee can fly in a straight line back to a place where it found food. 3 Wolves usually hunt together in a group or pack. 4 Dogs will often bark more out of fear than out of aggression. 5 Cats and dogs often run round in circles thinking their tail is running away from them. 6 Pigs have a reputation for eating a lot of food very quickly.