Ok, starting out with a couple notes on our small flock. First time chicken owners. We purchased 4 Red Star pullets back in April. We have a fairly large run and a enclosed secure run but let them free range all day. We're on about 5 acres but they typically stay around the yard and edges of the woods. One started laying within 3 weeks but the others never laid. The last week or a little more it really seemed like one had all the signs. She was squatting when you approached her and she was making some solo trips into our thick woods but always popped out a few minutes later or you could find her pretty quick. Last night, 4-21 she was nowhere to be found when I got home from work. Never came to the coop for the evening. Did not see her this morning. This evening I went on a mission to find evidence of a predator attack but nothing. I have many trail cameras up around the property and a nest cam on the coop. No evidence of anything other than a pair of baby fawns and mama that have been hanging around. Problem right now is that it is so thick I would have to step on her to find something. What are the odds she is sitting on a hidden nest? Better odds a predator got her? Our one hen that lays uses the coop for what it's worth.