I know this subject has been brought up a zillion times, but I've never seen a satisfactory answer as to why a chicken shakes their head. I know there are many reasons and they're mostly transient in nature - a shake of the head to get rid of something such as an insect or moisture. But my SS pullet does it all the time, and it's quite extreme at times, accompanied by scratching the side of her head with her foot. I've examined her head very closely on several occasions, but she appears completely normal and healthy. Clear eyes, nostrils, nothing seems to be wrong with her ears, no parasites. However, when she was just two weeks old, she was scalped by the rooster. The skin on the entire back of her head was surgically removed. I carefully tended to her wound for many weeks until she re-grew her skin and even feathers. Could she be suffering residual brain injury? Can chickens get ear infections?