One of my chickens stopped laying eggs. She was born in January and was laying just fine until mid-August. Our chickens free range in our backyard. Our girl had a way of escaping our yard and one night, while i was out of town, she didn't make it back to her roost by nightfall. My husband found her at our back door at 5 a.m. the next morning. We have "sealed" up the yard and she hasn't been able to get out since then. However, she also hasn't laid an egg since then either. Is this simply PTSD or could it be something else. She's acting normally otherwise - she doesn't look to be molting and she's not broody. I have found her in the nesting box a few times, but no eggs. Today, we didn't get any eggs from our 3 chickens, but we had a massive thunderstorm as well.