I have a 4 day old white silkie chick who has something wrong with its eyes. It's eyes have been closed a little more than the others since I got it, but today they were closed even more and looked a little puffy. In the photo the chick is the one on the far right. What is wrong with it and what can I do to help it? It's not being picked on by the other chicks and seems to be healthy except for the eyes.