Since yesterday morning, my 1 year old buff has been sitting in the nesting box with feathers poofed out. When I pick her up/take her out...she just jumps back in. She looks sickly and her underneath feathers (not by vent, but where legs meet body) are kind of matted. Last night I was worried she had some sort of parasite, but I thought it was odd that the other 5 hens seem healthy. This morning I am researching egg binding and worried it is that! I can't feel an egg. I have tried giving her Tums, but cannot get her to ingest. I tried making a slurry and using syringe and wrapping little pieces in raisin. Can this self resolve? What else should I be doing? I feel like I'm against the clock here, as I read it can kill them in 24 hours! I'm a new chicken owner and this is my first illness. I wonder why this would occur so suddenly?!