Turns out
@micstrachan was correct, they were talking about eggs. They have all decided to lay at once and it is a big mess.
There was traffic congestion at the nest boxes so Minnie laid her egg on the floor in the middle of the coop.
Maggie laid a perfect brown egg which Diana messed up by laying one of her no-shell eggs and coating Maggie's egg in yolk.
Dotty laid a beautiful egg and as she often does then pooped all over it (I think it is an anatomical defect actually - she doesn't shut off the poop pipe when she lays).
So there I am with 4 eggs in various stages of sticky disgusting-ness and 4 hens all yelling at once to be escorted. Where exactly? They are all there together by the nest boxes.