This is a very strange thing, I've never seen this before!!!
We have two little girls, one BO and one Australorp. They are free-range and have a very nice coop. They're around 2 years old, and they're slowing down on egg process. My stepdad called me out, and I came out to look, and it turns out that my girls have made a lair in our blackberry bushes!!! Trimmed with thorns, they sure do know how to conceal their 'home' from raccoons!!!
Entrance (hidden, eh?)-
Inside the first area (the egg area, I call it, lift up the leaves above in the 1st and you can see inside):
The secondary area (completely hidden, unless looking specifically for it):
The other way in:
It's incredible, the structure they've put together! The place is COVERED in thorns, and they can get in and out! Very smart, Ammy and Pepper, very smart.