I have a post up about this as well. I bought a cochin, turkey, and turken at the same time. The turkey and turken are nearly half grown and in the coop already. The cochin is in a smaller pen with a 3 week old turken and cochin bantams. She is barely larger than the bantams even though she is a good 10 weeks old at this point. When she peeps, it sounds like she is hoarse, sometimes no sound comes out at all. She eats well, poops, and is active. I keep telling my sister she cursed the chick because the day I picked them up, she was with me and said it's a shame they don't stay that size. I told her she is going to have to keep it in a bird cage in her house!