A hen I've had since I first got into raising chickens has fallen ill. I first noticed this when I was changing my chickens water and saw that she was missing. I looked everywhere and found her under the house. Everyday when she's let out, she'll eat but then quickly make her way under the house for the rest of the day. When the flock goes to bed, she refuses to go on her own. I've had her separated for now but I can't seem to figure out the issue. She seems exhausted and doesn't cluck anymore. And if she does cluck, it sounds funny. Almost like she has boogers in her throat. Anyone know what may be wrong with her?