Thanks Eggcesive.
Her crop has been reasonably full at bed time and slightly full on waking up. Having a drink and a quick massage and it goes. It's not big though but certainly not totally flat by bedtime.
For the last 48 hours, she's just lost interest in treats. She's still drinking and trying to eat (with a little bit of success) her pellets but nothing else. She's very weak. Balance is now poor and she's in the 45 degree stance, which is new. Her abdomen is filling up again and she's lost about another 3oz since the last post. There's no muscle on her to speak of.
I tried to give her Emeraid Omnivore but she wasn't interested. I managed to get a little through the side of her beak but at this point, I'm trying not to stress her further by tube feeding.
My guess is that she will pass in the night. She is an incredible fighter - still trying to eat and drink before she settled down. I have her in an indoor cage, nice, warm and dark in a room that is closed to everyone else including cats.
With our time difference, I can read any suggestions before I see her in the morning, and should she have battled on another night, I can try whatever you suggest. Never knew about the vit B. I could have supplemented that - although it's in the poultry tonic that I'm giving her.
Finally, her poop has gone runny again. Initially green and now slightly yellow. Shame, I'd just helped her get back to solid normal looking poop.
I hate losing a hen and I try very hard to do what I can and to learn from each experience. This is one of those occasions....