We've got 4 new chicks (2 two week olds and 2 one week olds). We couldn't get our usual shavings for their box but the bag the farm supply gave us, saying chicks love it, is quite fine. We put it in and see that the chicks are happy doing a dust bath, but they also seem to be eating it! Is this okay? I'm wondering if they are confusing it with the feed that is naturally on the ground outside the feeder. We're thinking maybe we should take it out and put in some of the courser shavings. Feedback?