Increasing Egg laying

[Jo4dunx]

We have lists of hens and some cockerels also we were getting lots of eggs around 6 weeks ago then all of sudden it just stopped . One of our chickens has just sarted laying again but all the others havnt. What can we do to increase eggs ? We feed layers and mixed corn they have fresh water every day . We have nesting boxes which they don’t tend to use they seem to lay in the straw in the corner of the coop they are given left over food fruits and vegetables on a daily basis . They have a large run and then a large inside coop area .
thanks

 

[Ponypoor]

Are they molting? they likely won't lay while molting...

 

[Jo4dunx]

Are they molting? they likely won't lay while molting...

No I do t think so

 

[rosemarythyme]

How old are the layers?

Has it been very hot recently, or have you had any changes, i.e. new feed, added new birds, changed coop layout, a predator visit?