I get my fresh birds each May at the feed mill I am employed by. And my breed of choice is called a sex-sal. They lay brown eggs also. And as the others, these also lay about 1 egg per day each, except when in molt. Each year chickens molt, or lose the older feathers, and grow new ones.
Most hens stop producing eggs until after the molt is completed.
What we provide our hens as chicken feed is specially made to meet all of the nutritional needs of a chicken. The main ingredient in chicken food is grain, usually a blend of wheat, corn and barley. Grain provides calories and protein. The amount of each ingredient in the feed is changed slightly as the chicken gets older. They are peovided also with fresh water daily, fresh hay and scratch.