I just had a silkie chick who as about 9 weeks old die. It was fine an hour ago out with it's flock buddies, eating, etc. All of a sudden it was flopping around in circles, beating it's wings like it was trying to get upright and then died. Help? I have no idea what is going on. No signs of a cold, crop felt fine, eyes clear. I'm concerned for the rest of my flock and the other silkies I have.