I have a silkie that is about 14 weeks old. This morning she is sick. Not getting up. She seems weak. Don't hear or see any signs of resp problems. I had taken another hen out of the pen a few days ago for resp problems and isolated her and giving sulmet. This silkie doesnt appear to be having any resp problems. What do I do? How can I figure out what is wrong? I think I may heve put a little ACV in their water day before yesterday but if it was their waterer it was a very small amount.. Any suggestions would be greatly appreciated. I am new to chickens and I don't know what to do or look for. Please HELP !!