Most ex-battery hens fall into this category and breeds that are in their first year
or later of laying. The seller should be able to advise on the producing number of
eggs of the chicken at this age. As chickens become older the number of eggs will
fall although high-yielding hybrids may continue to lay a satisfactory number of
eggs if correctly fed well beyond the first year.
Chickens that have adult feathers and no longer require outside heat in the form
of lamps to provide sufficient warmth are around the 10 week old region.