I let the chickens out this morning and found a 3 month old white faced black spanish just sitting in the bedding in the coop. These things are usually very skittish, and won't let me get too close. Well, she let me pick her up. As soon as I did, she started shaking like she was having a seizure and flapping her wings. When I put her back down, she stumbled a couple steps to the side and then collapsed. I did this same thing 3 or 4 times, and she did it every time. Any idea what this could be?