I've heard of many people that have had this certain problem with there birds now I'm wondering what causes it... Your bird doesn't grown, I have a chick the size of a 6 day old and my birds are almost 2 weeks old. Now if it wasn't going to grow then why start growing then stop at day 6? Why not just not grow at all from when they are 1 day old. This specific chick eats, drinks, poops, but then it just stands there or sleeps while the others run around, I'll probably have to end up culling it but I'm starting to wonder why this happens because I've heard it happen with a couple other folks. P.S. This chick hatch on its own but when it was out and walking the egg was stuck to it like the thing thats connected to chicks that lets them eat the yolk or whatever. He never got loose from it then I just took it off and he acted normal till he stopped growing of course.