I was walking into the chicken run earlier and I heard a very strange noise coming from the coop. One of my EEs had just walked into a nestbox, and was arranging her straw, and my rooster was standing next to her, watching her, and making this really weird sound...very hard to explain. It was like a very quiet trilling noise. I've never heard it before. A couple minutes went by and she settled into her nest. The rooster then went into the nest box next to her and started arranging the straw like she did and then laid down like he was going to lay! He only stayed there a few minutes then left the coop. What was he doing? There was no aggression or problem involved; I'm just curious.