Not laying / won't leave the coop.

[kris13]

So we have 13 chickens, half of which are around 2.5 years, the rest are just 1.5 years old. Most of them just went through molting, so expected a decrease / less production, but they've stopped now. No eggs in the last five days, and outside of two of them, they won't leave the coop much. They are a bit spoiled if the weather's bad, but today is sunny and calm, and still only two chickens outside. No signs of illness, they're all eating and drinking and chipper, just no eggs and running around the coop versus outside. Some do come out if we're around, but if we leave, they run back inside. Not sure a reason they don't want to leave?

 

[wyoDreamer]

Have all their feathers grown back? If not, they may be chilled when they go outside.
Has anything changed in or around their run? I added a stump for the birds to jump up on and they wouldn't leave the coop for 3 days - until I placed scratch on the stump for them to eat. It 2 hours for them to get brave enough to approach that evil stump, lol.