I have 10, 1 week old chicks. 9 of them doing great but one seems to be sick... She won't stand up and when she does, she will stumble or fall asleep. I separated her from all the other chicks, gave her some salt water and mashed hard boiled egg. She seems to be eating, but I haven't seen her drink or poop all day. Her vent is clean, and doesn't seem to be blocked. Any ideas of whats going on and how I can help? Thanks in advance.