Chickens pulling out green nesting pad

[Happy S]

Why do they pull out the artifical grass in the nesting box. This has just started. It has been in there from the beginning of laying. I put it back in and they pull it out.

 

[perkolator]

Because they don't like it?

 

[rosemarythyme]

How long have they been laying? Are all the girls laying or are there some that are point of lay? If there's some newer/soon to be layers it's normal for them to mess with nest boxes and kick everything out.