I have a total of 5 chicks who are now 9 days old. They have had the pleasure of being able to spend the past couple of afternoons outdoors since the temps have been near 80 or above. For their 1 week birthday they also graduated to pine shavings in their brooder. This morning I saw them all engage in a very detailed preening session in their brooder. They were also scratching themselves quite a bit. One chick kept scratching her ears and them making a yawning type motion, like maybe she had itchy ears. They are all eating and drinking and otherwise acting normal. They just seemed itchy. I haven't noticed them doing so much preening before. They are cochins and the do seem to be getting lots of feathers now. Their little wings are really looking like wings and they have foot and tail feathers now too. After a few minutes they all took a nap and then made a quick trip to the food and water areas. I looked them over under a light, especially the one chick with the itchy ears and I don't see any signs of anything being on them. So I was just wondering if this is all normal behavior and perhaps getting feathers is just an itchy process?