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The hens are good layers of white eggs. [12] They may give approximately 200 eggs per year, with an average weight of 52 g. [ 4 ] Bantam hens lay about 120 eggs per year; the average weight is 30 g.
The UK alone consumes more than 34 million eggs per day. [84] Hens of some breeds can produce over 300 eggs per year; the highest authenticated rate of egg laying is 371 eggs in 364 days. [85] After 12 months of laying, the commercial hen's egg-laying ability declines to the point where the flock is commercially unviable.
In the early part of the twentieth century, it was one of the principal breeds kept for this purpose, until it was displaced by modern industrial hybrid lines. It may be kept as a dual-purpose bird. Hens lay some 180–200 tinted eggs per year; some layer strains may give up to 250. [7] The eggs weigh about 60 g. [9]
Faverolles were originally bred in France as a utility fowl, used for both eggs and meat but are now primarily raised for exhibition. [ 4 ] : 46 [ 5 ] : 86 When Faverolles reached the UK in 1886, the breed was further altered to meet exhibition standards, British breeders developed a type of Faverolles with longer, higher raised tail feathers ...
Hens lay between 5 and 17 eggs per clutch and the eggs take between 23 and 24 days to hatch. There are between five and 10 young per brood. [ 15 ] The young are raised by the female and fledge in one to four weeks, are completely independent by the tenth to twelfth week, and reach sexual maturity by age one (Ammann, 1957).
As a farm bird, it is an egg-laying breed. Hens start laying early, at about 26 weeks, and give about 120 white eggs per year. [7]: 662 Eggs weigh more than 65 g from the 57th week of the life of the hen. [7]: 662
Red shaver hens can lay from 305 to 315 eggs a year, [3] and are reported to be prolific producers of large brown eggs. One four-year-old Red Shaver chicken in Ottawa was credited with laying an egg with a mass of 143 grams, which is almost three times the size of a standard medium egg (Typically a medium egg is 49 g, a jumbo egg is 70 g).
The first amniote egg – that is, a hard-shelled egg that could be laid on land, rather than remaining in water like the eggs of fish or amphibians – appeared around 312 million years ago. [6] In contrast, chickens are domesticated descendants of red junglefowl and probably arose little more than eight thousand years ago, at most. [7]