Hen has diarrhea and a bulgy bottom [Update - passed away]

1) What type of bird , age and weight.
Rhode Island Red cross, at least two years old (purchased last year, seller said she and the other hen were a year old), weight unknown.

2) What is the behavior, exactly.
I forget exactly when it started, but one day I walked into the coop to find that Quiet Hen was sitting at the far end of the coop where she and Yappy sleep at night. She was the only one inside. She hasn't joined the others in going outside in the past few days. A few days ago she did not lay an egg, but all other days she is laying perfectly normal eggs. Every day I have been checking her droppings to find any abnormalities. It wasn't until yesterday did I notice she was starting to have green diarrhea. Today there was more green diarrhea, and her feathers around her bottom are caked together by some of the diarrhea - the diarrhea around there is yellow-ish. Today I observed her going outside the coop, but not going far. Her head was not doing the usual chicken-bob as she walked forward. She was moving very slowly. I picked her up and she flailed a bit, but then she gave up. That was when I noticed her bottom at her back end felt bloated and squishy.

3) How long has the bird been exhibiting symptoms?
Since the 11th I believe.

4) Are other birds exhibiting the same symptoms?
No.

5) Is there any bleeding, injury, broken bones or other sign of trauma.
Some broken/missing feathers from rooster.

6) What happened, if anything that you know of, that may have caused the situation.
Don't know.

7) What has the bird been eating and drinking, if at all.
Have not seen her eat or drink in the past few days.

8) How does the poop look? Normal? Bloody? Runny? etc.
Green diarrhea.

9) What has been the treatment you have administered so far?
None. Isolated her in the kennel inside the coop. Will be giving her some water mixed with electrolytes and vitamins, and some scrambled eggs.

10 ) What is your intent as far as treatment? For example, do you want to treat completely yourself, or do you need help in stabilizing the bird til you can get to a vet?
Just myself.

11) If you have a picture of the wound or condition, please post it. It may help.
If required, I will try to take a picture. No guarantees.

12) Describe the housing/bedding in use
Large 7x20+ coop (probably wrong; keep forgetting the exact measurements) with straw. One end was cut off recently to accommodate the chicks (they have shavings). Adult chickens are free range and have access to entire 8-acre property.


EDIT: I gave her the scrambled eggs, and she ate it so fast it was as though she was starving.

EDIT2: To know more, read post #12 and on.

 

Thanks.

I do use different footwear between the coop and the feed store. I have my rubber boots for the property (mostly coop), and my shoes which I use for everywhere else.