I have the same issue...chick is at least 4-5 weeks old with NO feathers except on wing tips...and is losing its down. It is growing like all the others! Did yours turn into a rooster?? I hope not!!
I've had my little nuggets for about two-three weeks now and I am totally new to chickens. I currently have 3 Silver Laced Wyandottes (one who is growing but not getting feathers!??), 3 Araucanas all looking very different, 2 of the friendliest Brahmas, 3 Olive Eggers, 2 little fluffy...