I just hatched out several batches of chicks, and in the second successful hatch I got 2 really itty bitty chicks, both Silkie mixes since the lady I got the eggs from only has 2 Silkies roos in with all her bantam hens. One was red, one was black, but even at hatching the black one was so much tinier than the red, and the red was super small! They are in the big brooder with standard size chicks as well as a few other bantams, but they are 3 weeks old now and while the red chick has grown, the black one hasn't grown much at all. I mean this chick is super tiny! If I hold it up, it's only about as tall as my thumb! 3 weeks in! It's also feathering in really slow. It barely has any wing feathers and no tail feathers yet, whereas all the other chicks have much more pronounced feathering. The chick has very short down too that feels like velvet when you touch it, so I named it Velvet. I was worried at first because the first week or so Velvet seemed weak and was getting pushed around a lot, and I was getting ready to move it and the red chick to another brooder to prevent trampling, but Velvet perked up, and I get a kick out of watching it interact with the other birds now. Velvet climbs inside the food dish to eat, it never eats from the holes, and when it gets tired, it finds a larger chick and crawls under the bigger chick's wing and goes to sleep. It's too cute! If you sit Velvet down next to my BR chick, it doesn't even come up to the BR's hip! Makes my BR look like Godzilla, lol! I'm curious to see how big my Velvet gets. It sure is a cutie!