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The egg-laying performance of Australorps attracted attention when in 1922–1923, a team of six hens set a world record by laying 1857 eggs for an average of 309.5 eggs per hen during a 365 consecutive day trial. These figures were achieved without the lighting regimens of the modern intensive shed.
Sex-links come in several varieties. As hybrids of laying or dual-purpose breeds infused with extra vigor via heterosis, sex-links can be extremely good egg-layers which often produce 300 eggs a year or more depending on the quality of care and feed. The color of their eggs vary according to the mix of breeds, and blue-green eggs are possible.
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).
Fibromelanosis is also found in some other black or blue-skinned chicken breeds, such as the Silkie. [6] [7] The roosters weigh 2–2.5 kg (4.4–5.5 lb) and the hens 1.5–2 kg (3.3–4.4 lb). The hens lay tinted or cream-colored eggs, although they are poor setters and rarely hatch their own brood. Eggs weigh an average of 45 g (1.6 oz).
Beyond that point, their egg production gradually declines, and by around the third year, egg laying may cease, sometimes even earlier. Therefore they have a short production lifespan. The Golden Comet chickens are frequently adopted by the public as rescue hens once they have completed their initial two years in commercial production. [2]
'Leaving us surprises even now. So clever. So missed,' Bowie's son Duncan Jones tweeted.
Orpington hens lay about 180 light brown eggs per year, with an average weight of 53 g; [8]: 158 [15]: 66 bantam hens lay about 110 eggs, with a weight of some 40 g. [16]: 67 It was said that at one time Orpingtons were capable of laying as many as 340 [5]: 115 eggs per year. The decline in production was due to breeders selecting for looks ...
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