Today, two of my 9-month-old cockerels left the flock while they were free-ranging (they have a big coop and outdoor run but I let them out to free-range every day with supervision (too many predators) and went into the coop together. They have never done this before. After a minute or two, they started buckbuckbuhGAWKing, much like the egg song. Then they were quiet and I heard bumping and scratching like I hear when the pullets are preparing a nest so they can lay. Then all was quiet for quite some time. Finally I have to see what they were up to. I went into the coop and found one of them hunkered down in a "nest" of shavings they had made on the floor in the corner of the coop. The other was just standing there, staring at him. About 20 minutes later, when I put all the chickens back in the coop/run, I found that the two roosters had switched places and the other was hunkered down, sitting quietly with tail up in the air on the shavings "nest." When I tried to get near to them, they both growled at me. I SWEAR they were acting just like laying hens. Is this some other kind of behavior I don't understand? Every day, I let them out and the roosters hang with the ladies, give them bugs and seeds, call out when they see hawks... normal rooster behavior. Today was very strange. Had they been pullets, I would have assumed they were going to lay eggs on the floor in the "nest" they made. Any thoughts?