My black silkie bantam is on the right, 3 1/2 weeks old. She was behind in growth with 3 others I had and adopted out 2 weeks ago. The chick on the left is less than a day old (wyandote). If she looks like she's missing butt hair, she is. In her first week she keps developing poo plugs over her vent that I had to remove, that caused the bald butt. she just seems so small?