I bought a trio of seramas this fall, all are under a year old. I haven't got the hatch dates yet from the breeder I bought them from so I am unsure of the exact age. The hen in question is a grey pearl. Her weight is 463 grams. Recently I moved them out to a heated coop in the garage once they passed their quarentine time which was well over a month. Everything was fine until I reached in their coop one day to refresh the water. Her head shook uncontrolably starting out really fast then slowing down, after it stopped she began acting like a normal hen again like nothing had happened. SHE has just gone broody and I went to take video of her last night so I can share with you all. Seems everytime I put my hand in her nest box she has a bad seizure? DO chickens even have seizures? As far as i know she has never been sick and they have been seperate from my flock since I got them just because the rooster doesn't get along with the flock also for breeding purposes. Her bedding is pine shavings, she eats/drinks like any normal chicken, poop is normal, no funky smells coming from her at all, crop is just fine and she is not egg bound. There is no way for her to have injested anything poisonous and absolutely no mold in her coop. I brought her in last night to check her for mites or any kind of wound and found nothing. I put her back in her coop in the garage with her buddies since I can't find a thing wrong with her other then this head shaking thing. Can anyone help me figure out what is wrong with onyx? I would really hate to loose her and am really concerned about her. Here is the video of her last night, I put my hand in there and she went to bite it so I backed it out, she is broody on top of all this.