i just got my baby chicks in the mail about 3 days ago. I assume they are at least 5 days old, with wing feathers already starting to grow in. i noticed that they have been shaking their head a lot. when they eat, when they play, even when they're trying to sleep! they also do kind of a grooming motion where they bury their beaks in their feathers. they seem really bothered and uncomfortable please help!