One of my ko shamo's was the loudest Crower I've ever heard! He just would not stop from 5am till dusk! On the whole they are fairly quiet breed though, I think if you keep them with a decent amount of hens it keeps them busy, also if you give them plenty of bedding, and dust baths that seems to keep them concentrated on scratching and pottering rather than making a noise! only problem is I like the hens to free range and my neighbours would not tolerate having crowing birds wandering around the garden at any time of day!