I just got a new chicks Saturday. They all twitch their heads frequently. There is one that is extremely wobbly. I have only seen it come out with the others for food and water a couple of times. I have been assisting it to make sure it's eating and drinking. It almost falls over when it tips it's head back while drinking. I talked to a lady I got them from when I got home and noticed the twitching of the heads. She said he didn't notice anything except them eating and drinking prior to leaving (of course). So I didn't bother mentioning the other chick. After doing some research I'm fairly certain it's a vitamin deficiency. Does anyone have experience with this? What product is my best option?