im not sure how to describe it but i'll give it my best. whenever my hen shakes her head she always does this weird jerking movemen.t with her head right after like she has water sloshing in her skull. She cant stop it until she does it a couple times. It kinda looks like she gets dizzy after all the shaking. She does this every time she shakes her head and none of my other hens do it. i dont think this is normal..maybe its some time of neural problem? i dont know what do you think?