One of my four girls died a couple days ago. She was the "leader". Since then, the other three don't come out of the coop much. They are eating well and seem okay. The second they hear me open the back door (or even undo the lock on the door), they come running out of the coop. They gobble up their sunflower seeds and seem okay in all other respects. Do chickens get sad? Or perhaps they are confused without their leader and need to establish new pecking order. I just want to make sure this sounds normal-ish and isn't a sign of illness even though I can't think of anything wrong with them. They seem totally healthy. Thanks.