Egg shell colour is determined by the breed of chicken. There are many shades of brown eggs from cream to mahogany, white, green and blue. For example, leghorns lay white eggs, welsummers lay dark bown and legbars lay blue.
Yolk colour is determined by what the chicken eats. Some chicken foods have additives to make the yolk colour more attractive. Free-range hens have better yolks as they have a more varied diet. Natural foods high in beta carotene, e.g. maize and green vegetables, help to produce more orange-coloured yolks.
Eggs will stay fresh for up to 3 weeks if stored in a cool place out of direct sunlight. They should not be stored in a fridge.
If you're a chicken owner having trouble with either the quantity or quality of eggs from your hens, please take a look at our Hen Health