I have 8 chicks (5 regular 3silkies) and one of the silkies just doesn't seem to be growing! I've had them for a week and they're almost 2 weeks old now, and alll the other chicks are quite bigger than when we got them. She spends most of her time sleeping, though I have seen her eating and drinking. She doesn't have pasty butt. Any advice? I enclosed a (bad) picture of her compared to another silkie.