She's a white leghorn, bred for egg production and the most common breed used in the egg industry. She is bred to produce 250-300 eggs/year, 5 times more than normal.
Her beak has been cut off, a painful procedure that leaves her with difficulties eating and preening.
That does not stop her from enjoying a close-up! Ethel stopped to sip some water from a puddle, then paused so I could get this shot of her.