In 2012, a light Sussex bantam hen named Squeak literally ruffled her own feathers with a big sneeze. According to her human, sneezing can be a sign of illness in a chicken, but little Squeak recovered quickly and was fine the next day.
We keep 5 bantam hens in our yard for eggs and entertainment. We live in suburbia in the city of Brisbane, Australia, and the whole yard is their domain and sometimes the house tooOne night we heard this incredible noise from the coop every few minutes. I went out to check on the little darlings, half worried it was a snake or some other critter bothering them but it was just Squeak sneezing away. The others didn’t seem too bothered but I brought her inside to monitor and possibly take to the vet the next morning. She spent the night in a box in the spare room and she sneezed through the night. By the morning she as right as rain. Not a sniffle, so out she went and that was the end of the episode.