I hatched a dozen chicks and one is just weird - it won't grow. the wings grew but he is still little and kind of hunched over. his feet seem ok and he can move around and he appears to eat and drink but mostly he just sits around. now i've put him in with new baby chicks. they don't seem to mind and he doesn't bother them. what is this and do you think he is just going to die? he's about 3 weeks maybe 4 weeks old.