Thank you for you reply...she is alive. She has been drinking electrolyte water with vit.B12 added on her own, and has been pecking at the crumble. I soft boiled an egg but she wasn't interested in it. I tried a small piece of baked salmon, but she wouldnt take it. She pecked at a little seed mix. I tried bringing her back to flock this evening, but the top hen was dominating her. When the girls went back to the coop she wasnt in the coop with them. I went in the house, about 15 minutes later she pecked on my sliding glass door, wanting in (smart girl!), so she's back in the house. I didn't hear the rattling in her breath like I did last time.
I'll try the Ca citrate. Her abdomen feels bloated, her poops are still white with green. I dont know what her crop would feel like if its empty. How would I get flid to be drained from her abdomen? Can chickens be depressed?
Once a hen has been separated out from the flock, often it's a challenge to reintroduce them, they can be viewed as a newbie or intruder. Once she's better, try a see no touch method like caging her within the coop or run so they can become more familiar with one another. The Top Hen is doing her job, I know it can be hard to watch, but unless she's being beaten up badly and injured, letting it play out (with you just monitoring) can be helpful. The Top Hen is making sure the "newbie" knows her place. Now, some Top Hens can be quite overt too, so monitor closely.
To check the crop, feel of it when she goes to roost, then first thing in the morning before she's had anything to eat/drink. At night, you should be the crop fairly full if she's been eating/drinking well. (If she's really eating good, the crop may feel very firm and quite large like a tennis ball).
In the morning, before she eats/drinks, feel the crop again, it should feel flat or empty.
The crop is on the right side of the breast, it's like a elastic pouch that holds food/water to be processed. It can feel fuller/emptier during certain times of the day, this is normal due to eating/drinking and of course processing of foods and pooping. The best way to gauge function is morning after a full night's sleep and the bird has been processing food(s) overnight.
Not hearing the rattling a good. She may be somewhat naturally reabsorbing some to the fluid and expelling it from the body, it's hard to know.
Draining is done with a needle, there's a video below.
Alternatively IF the fluid is not too severe, you can try giving an Aloe Detox which may help with the reduction in the fluid.
IF she's having respiratory distress, having a hard time walking/moving, the comb is turning purple, etc. then draining can sometimes give that temporary relief, then you can see if a maintenance of Detox may be beneficial.
https://www.backyardchickens.com/th...le-to-move-now-laid-egg.1446105/post-24045478