Chicken laying down a lot... Close to laying?

[sunny & the 5 egg layers]

My 17 week old Dark Brahma is laying down a lot more then usual. Like yesterday for example, most of the other chickens were outside in the run while she was laying down on the floor of the coop. Is this a sign that she will be laying soon?
Here are afew pics of her that I took yesterday...

 

[equine chick]

If you go to pick them up and the squat then they are close to laying.

 

[jason180sx]

i am the same my hen and rooters always sit down and they are 16-19 weeks old but there is one rooster that nevers sit down

 

[ThinkingChickens]

My girls do the squat which is wings tensed and spread out and kind of a lower sit but not laying down. The only times my girls lie down completely is to dust bathe. Otherwise they are busy busy busy.