If you want to "make him quiet", don't get a rooster. They can and will crow anytime they feel the urge. (not just in the morning)
Mine eats what the hens eat, which is Flockraiser. I understand that layer feed is not good for roosters.
Other things to consider to keep him "in line" (this is my approach to my rooster, some people may not do it this way): I am top rooster, therefore, my rooster is not allowed to mate in front of me. It only took him being knocked off a hen twice before he got the picture. He tried it again yesterday, but got off her when he saw me coming.
I also do not yield to my rooster. This means when I'm walking, I walk
through him and he yields to me by getting out of my way. My rooster does not get to eat until the hens do. (treats) He does this automatically on his own, he's a good boy. With him, I do not have to worry about turning my back.
Sometimes, no matter what you do, you'll just get a meany. They just get a one way ticket to the soup pot.