I have a two yr old bantam buff brahama that was perfectly fine this morning. She has been eating drinking running around like normal. I let them out in the pen this morning all was well. I was out collect eggs and she was fine. This evening when I went out to put them up everyone was in the barn except for her. She was stumbling around in circles. I tried to guide her to the door but she just couldn't walk straight. I picked her up and carried her all the while her head was curling upside down. I put her down in the doorway of the barn and she collasped on her back with her neck twisted around. I thought for sure she was dying right then and there. But she didn't. Her eyes keep rolling back in her head and she can't seem to stand without woobling and flopping on her back. I don't know if she is having a stroke or what. I have never seen anything like this before. Does anyone know what is happening? Has anyone had a chicken that has had a stroke? Can she survive or should I just put her out of her misery?