- I sprained my ankle
I found this article interesting so I posted a link "The authors found that there were more vocalizations during dark periods and that peak frequency of vocalizations decreased with age. They were able to detect deeper vocalizations in older birds, and reported the peak frequency decreased by about 1,000 Hz over the entire production cycle, indicating the vocalizations decreased in pitch over time. Increases in peak frequency were also found to be correlated with decreases in food and water intake. Low peak frequencies of vocalizations could indicate low stress and higher production performance on-farm."
