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Explanation: Any reference I could find, suggested that by this age, English-speaking chickens are not laying any more. Maybe someone with more knowledge of agriculture could correct me.
From the reference below:
"Commercial Layers: Usually leghorn hybrids that are used for the purpose of producing eggs (infertile) for human consumption. The mature hens weigh about 3.5 to 4.5 lbs. These birds come in production at 23-25 weeks of age and peak in egg production at 28-32 weeks, usually around 90%. The hens are kept for about 14 months of lay and are expected to produce from 250-270 eggs."
This would take them only to 86 weeks of age, maximum.