I have a 4 week old partridge silkie chick who doesn't seem to be growing. I got "her" when she was 1 day old, and she was about the size of a golf ball. She eats and drinks obviously (or she'd be dead!), but she's very small. She actually looks like a 1 week old chick. She's out of very good stock...both parents are winning show birds. Could she be a "runt"? Here are some pics of her with the other silkies I purchased at the same time. The bigger chicks are 5 weeks old, and the little partridge is 4 weeks old! See what I mean....BIG SIZE DIFFERENCE!