I noticed when I took my 2 week old chicks out tonight that two out of the three are breathing pretty hard, and one of those two is sneezing with a little bit of clear discharge around one nostril. The one who isn't sneezing but is breathing hard seems to be having a really hard time taking a breath, and she lays down a lot but has done that since we got her. She is taking deep breaths pretty quickly. I didn't hear any wheezing or sounds out of any of them, and this is the first night that I have noticed them having problems breathing or sneezing. Does anyone have any idea what could be wrong, and what I can do to help them? Thanks!