I came home this evening and found that one of my NH Red chicks is not doing well. She is laying down, lathargic and doesn't run away when I try to pick her up (like the others). I also noticed that she is a bit smaller than the others. When I picked her up, she didn't stuggle, but did peep a little. They are all 6 days old. We are feeding them Purina Starter feed and they are drinking water with vitamins/electrolites for the first time today. The 24 others are very active and eating/drinking well. I did notice that their wing feathers grew quite a bit today. Her's are a little shorter. Could she just be a sickly chick? Any other ideas? Thanks.