I have a 4 year old RIR hen that started having difficulty getting up into her roost in the last few weeks and 3 days ago could no longer get up. Her head is hunched over and stomach is tender when I touch it. I have her in my bedroom and she is drinking but not eating. I've checked for being egg bound and she is not. She had diarrhea the past 3 days but this morning poop was normal. I have been giving her ACV in her water and scrambled eggs in olive oil. She still won't get up and sleeps most of the time. Any idea what could be wrong with her and is there any hope of recovery? She only lives with one other hen and they eat layer crumbles mixed with bird seed and occasionally lettuce and left overs. Any advice is appreciated.