When chickens don't produce eggs

[Gary Jang]

My 4 chickens seem to have quit laying at the same time this summer. They are different ages and different types. They molted together and stop laying together.
What might have caused this

 

[casportpony]

My 4 chickens seem to have quit laying at the same time this summer. They are different ages and different types. They molted together and stop laying together.
What might have caused this

Can you post some pictures of them so we can see what they look like?

 

[rosemarythyme]

What's the age range of the birds? If they're all over a year then it's possibly just that they had their yearly molts together and likely won't start laying again until day length starts increasing again.

 

[JacinLarkwell]

Temperature extremes (too hot or cold) and lack of day hours will cause decreased laying