all four chickens were fine this morning. in the afternoon I noticed one was breathing funny. Making a noise as she breathed in and out. kinda raspy. Not gurgling. Still eating and drinking and running around. I isolated her gave her Vetrx, kept her warm. She is still eating and drinking and by 1030 pm all noises has stopped. No runny nose or watery eyes. This morning I checked her and its like nothing happened. I checked her crop to make sure it wasn't hard. Seemed normal. She went immediately for her blueberries, lettuce and dry oats. Made her normal noises. Opinions?