I have one chicken that seems to be sick. Her legs are scaly so I am treating her for scaly leg mites, but she is also squeaky. That is the only sound she makes. This morning I noticed that when other chickens bolt for the food, this one walks around, is interested in it, but lets the others dive for the food first. Here is a video of her squeaking. She makes the sound a bit longer and louder towards the end of the video. Does anyone have any ideas what it could be or suggestions?