Everyone has stopped laying

[Mackie n chicks]

Ok so all my 6 chickens are 'getting on a bit' with the eldest being 5 years old up to the youngest of around 3 years old. Over the last two weeks all but one has completely stopped laying! I had three which still layed quite regularly, every two days and they have all stopped - i'm baffled! They all seem fine in themselves and continue to wander about but no eggs - any ideas?

 

[TheTwoRoos]

The girls are at their "Retiring" age.They may completely stop,and/or just slow down a bit,sorry.

 

[Lelilamom]

Could be a combination of things. Molting, change of weather, change of feed, predator attack or threat of an attack, change of roosting/nesting/coop location. Age definitely is a factor but seems unlikely since everyone stopped in a small span of time. More likely environmental.