Very sick hen

Egg bound, water belly, fat deposit, etc---its hard to say without more details. How long has it been since she layed? Is she real heavy---heavier than normal chickens her size? A pic might help.

 

Upright stance, problems walking, runny poops with yellow material or bright yellow stools can be from internal laying or egg yolk peritonitis. Has she laid eggs in awhile? Has she lost any weight through her breast bone, or does she have any swelling or fullness in her lower belly? I would try to get her to eat and drink, by adding some chopped egg to her diet of chicken feed, and some vitamins to her water. Make her comfortable, but if she starts to act like she is suffering, she may need to be culled. Many hens can suffer from reproductive disorders.

 

I would take her out of her misery, but that's your call----she looks like she in miserable.

 

I would also think about putting her out of her misery, since she is wasting away.

 

She defiantly is showing signs of egg peritonitis, from her penguin like stance to the swollen abdomen. I have a chicken currently going through this issue right now, who I believe is the same breed as your hen. Rhode Island Red Chickens lay a high volume of eggs and this problem occurs more often in high egg producing breeds. I currently am feeding my chicken a low protein diet with lots of watery vegetables and fruits and her condition is continuing to improve. If she is still eating I would recommend feeding her lots of cucumber and watermelon to flush her system out. If you do not see any improvement within a few days there is a method of draining the fluid out of her abdomen. Here is a link to the video on how to do so. I hope she gets better!