Chickens hear well. They begin hearing while still in the egg after 12 days of incubation, and their hearing doesn’t degrade with age as it does for humans. Their ears aren’t visible as a special tuft of feathers covers them, but you can easily spot their earlobes. Like humans, they have an outer ear, a middle ear, and an inner ear. They can also locate the source of a sound by determining the time lag between sounds arriving to each side of the head.
sense of hearing