Okay, so I was watching my week old chicks and I noticed that they have started randomly shaking their heads like something is bothering them. I've been trying to figure out why they might be doing it. So far these are the possible reasons I have found: They are too cold, loud noises, and mites. They do it at random intervals and I'm usually quiet when they are doing it. Also, I'm pretty sure they didn't start doing it until recently. At first I had them in the brooder with a red bulb that was probably around 250 watts, but then I accidentally broke it :/, so now they are under a white bulb that is probably between 100 and 150 watts. I say probably because these are bulbs that I had on hand. They could be hearing loud noises and I just didn't notice the shaking until now. So what do you guys think it is and should I do anything about it? They seem to be acting fine other than the shaking.