Hello, this is my first time raising chicks so I was hoping you guys could please help me out. I have 4 silkie chicks that I got from craigslist four weeks ago. They are 7 weeks old now. I had them inside in a brooder since I got them at 3 weeks old and they just went to the outside coop last weekend. When I got them, the lady told me to watch for a funny head tilt thing that would indicate a vitamin deficiency. I thought that I saw a couple of them do it (or maybe I was just paranoid) so I got some vitamins to add to their water last week. About 5 days ago, I noticed one had it's eye closed shut. I flushed it with saline and it opened up, but it still kind of squints. I also noticed it may have a little bit of nasal drainage/crusty stuff. I'm also wondering if the area of skin around the eye doesn't look normal-is there feathers missing? Please see the last picture for a close up. It also might be acting a little off-but it isn't lethargic or limping or anything crazy. Thanks for any advice!