I have a 3 day old chick that has been standing around with its eyes closed, wings sometimes held out from its body, and its rear end is throbbing. The anal opening is clear, but it looks a little inflamed. (I had cleaned some dried poop off the area below the vent area which is why it looks wet). What could be wrong with this chick and is there anything I can do to help? They are in a brooder with a Premier heating plate, medicated chick starter and clean water. If it matters, I had put a few drops of Nutridrench in yesterday's water.