I have a one week old, Silver Laced Wyandotte chick who is smaller and thinner than the other chicks the same age, maybe close to half the size of the others. We noticed on Sunday morning that it was laying down and not getting back up on it's own. It was eating and getting to the water just fine. Normal poop (except one time it was darker brown, i think because of the nutri-drench) very vocal and social. It just can't stand up! I do notice that it's leg seems to be sort of limp just on one side. So, it hobbles around or lays down. No other chicks have had any symptoms at all (they all shipped a week ago from MPC). I have considered and researched many of the things it could be and nothing quite fits, except maybe a vitamin B deficiency or some kind of stress. I am feeding them all organic starter feed, and the water has had Nutri-Drench for a couple of days, then Save-a-chick both electrolytes and probiotics the last couple of days. I have been giving him a drop or two of Nutri-drench alone just to supplement. I tried feeding him yogurt , egg yolk (some raw, some boiled), mashed up feed, and those in combination with vitamins. I have been doing this every hour or so for 3 days and i only see tiny bits of improvement. What else I can do? It eagerly hobbles over to the water and food and does this by himself. When I quarantined him on Sunday he was miserable and more stressed by being separated. So when I felt like this was nothing contagious I put him back in with the others. Anyway, just needing some help to know what to do next. I don't know if keeping up the regimen is working and I keep expecting him to not make it through the night.