Today, I let my chickens free range for a couple of hours while I watched over them. During this time, they went into a shaded/ cozy area of bushes and started to dig a hole. They ¨sat¨ in it and kept digging. Their feathers were spiky and their beaks were open. They were also making a few noises. They did this for about 1 hour. I thought they were going to lay an egg. However, at one point they got up, and just started to walk around again. I had never seen them do this. What was it?