I have 2 new chicks from my Silkie roo and Gold Brabanter (should be a very interesting looking chicken!). One of them has a curled up leg that she won't use as of this morning. She's about 2 weeks old. They are free-range in my backyard and I just put Poly-vi-sol in the water today. When I pick her up she protests and will hop away but only on that one good leg. I don't believe her leg is hurt or broken. Could it be a vitamin deficiency? The other chick is fine so far. She's so incredibly cute, I just can't stand it!!!