Has anyone ever had a chick make a soft whistling noise when it breathes? This one seems to be stumbling around a bit more. I'm concerned compared to the other chicks it's not going to make it. It kind of sounds like a squeaky pet toy. It is a silkie mix. It is not as energetic as the other chicks, and isn't as interested in the food and water. I"ve named 'him' Whistler for now. Experiences anyone?