I hinted at this in a previous post. Our Not-Buff-Orpingtons only stay in their pen out of politeness, not because they believe they are in any way required to do so.
I took these pictures at dusk tonight.
In this first one, you can see two blue-tarped structures. The one on the left (rounded at the top) is the Not-Buffs' shelter, the one on the right is the tarp that tents the rabbits' cages. (In fact, you can see Stiffler at the bottom center of the photo. We'll be moving the rabbit cages into the hoophouse for the winter sometime this week.)
Five chickens are perched on the bar over the gate to the main flock's pen (right side of picture), two are perched on top of their own house (left side of picture), and one is on top of the rabbits' tent. What you can't see in this picture is the other three little hens perched on the top of the gate to their own yard.
Here's a closer look at the gate sitters and the rabbit shelter sitter.
Let's do a little math.
Five chickens are sitting on the fence of the other chickens' pen - completely outside their own pen.
One chicken is perched on top of the rabbits' shelter - completely outside her pen.
Three chickens are on top of the gate leading to their pen - so technically half-in and half-out.
Two chickens are on top of their shelter - maybe technically inside the pen. Or not. They're not supposed to be up there, so I'm calling them as out.
Eleven chickens, with only 1.5 in the pen. (Well, three halves, anyway.)
Like I said - the fact that they're inside their pen in the daytime is probably coincidental.