I have a flock of mixed chicks that are 3 weeks old. Of the the batch haven't grown and inch. She's seriously about 1/3 the size of the others. She's not doing the best, moves slower and seems to get trampled on. Her they seem to curl I wards a bit. I'm just trying to see if I should cull her in case it's a disease or you know it's not going to get better and she's suffering. Or maybe she's a midgit. Can that happen with chickens? What do you think? She's the tiny one on the left.