We just got home and one of our chicks was collapsed in the pen, absolutely no signs of something wrong, last saw them about 5 hours ago and all appeared fine. He's warm, not stiff, but we can't really tell about breathing (too shallow???) we seem to feel a slight pulse. They had knocked over their water when we got home but it was filled with fresh at lunchtime. His crop feels hard but not warm or anything. Please help ASAP, I'd love even if someone could talk on the phone, we don't have any idea what's wrong with him or what to even do to check him out, we brought him inside to be near us.