I have a Chocolate Orpington Pullet that is 6 mos old and I noticed yesterday that she was sneezing and making a high pitched squeal kinda noise. No discharge from nose, eyes are clear and eating and drinking fine and poop is normal. She acts normal, but I'm concerned because she's never done this before and she and her lil sister are my first chickens. I was wondering do I need to give her antibiotics or just watch her to see if anything else develops?? Please respond ASAP so that I can get to the feed store if needed. Thank you so much for your help and responses.