Strange, sick, mad or just normal chicken behaviour?

[Jose21]

Sorry - think this might be a stupid question, but if chicks (nearly 4 weeks) twitch their heads, is it a sign of stress or are they just being chickens.....

 

[Ms.Frizzle]

Twitch like abnormally, or twitch as in bob it around to see? I don't suppose you have a Youtube video to use as an example?

 

[Jose21]

When sitting or falling asleep it seems. Not all the time. Like flicking their heads.... Every 4 or 5 seconds when ther are doing it.