Our set up is like this: We have a huge back yard that is entirely fenced by 7-ft wooden fencing. We can get to it through the garage and out the side door, or through the gate on the side of the house. Our original 6 chickens have free run of the back yard, and this has worked well for the 3-4 years we have had them. I have a yearling hen (black naked-neck, if it matters) who is acting oddly. A couple nights ago, she must have snuck in before dark and found herself a spot, because she was in the garage on the desk when I went through to let the dog out. Odd, I thought. But today, every time I've taken the dog out and left the door unattended - even just for long enough for a pug to pee - she's back up on the desk, face to the wall, cozied in like she's taking a nap. After I ejected her the third time, I found her at the top of the ramp we have set up for our disabled cat to get up to the window. I think the only reason she wasn't inside was because there was a cat on the inside trying to figure out what was going on. And moments ago, I went to the front of the house - and there was this chicken. She'd gone under the fence, it seems. Something none of my other ladies have done in the 3-4 years I've had them. She's not being picked on that I can see, they all hang out together and she and her yearling-sister roost together every night. I can't figure out what she's doing, or what she thinks she's doing. Any ideas?