This just started about 2 hours ago. My almost 3 year old EE hen is making a very loud sound when breathing. It has gotten worse over the past 2 hours. When it first started she wasn't making the sound when her head was down (while scratching and pecking). Now it is constant and louder. I picked her up and massaged her crop and stroked downward (lightly) along her throat in case something was stuck. It didn't help and I didn't feel anything. I tried to look down her throat but couldn't get her mouth open. I'm doubting disease at it just started and progressed within the past 2 hours. No sneezing, no discharge, she is acting normal and eating and drinking. Any idea what this is or what I can do for her?

