I have a 4 day old BO chick who is constantly opening her mouth to cheep, but not much of a sound comes out. Occasionally she will shake her head and cheep loudly. While the rest of the chicks sleep peacefully, she continues to open her mouth like she is trying to breathe/cheep. I've checked the temperature (fine), I've seen her eating and drinking, and I've checked for pasty butt. What else can I do? This does not seem normal to me with my limited experience. THANKS!