Over a month ago I noticed that one of my older hens (about 2 years) was not as active and looked slightly puffed up. At his point she just acted like she wanted to avoid anyone else. After a week or so she decided not to perch anymore and started sleeping in the dog house. At this point her poop still looked normal and she would go outside and lay in the sun before returning to the dog house. Another week passes and she started for 2 nights roosting again and pecking some of the younger birds when they came too close... I thought things were looking up. But, no, after that she went back to sleeping in the dog house. She is very thin and can only be tempted by scrambled eggs and cracked corn... but she only eats about 4-5 bites before quiting. Her poop is now very runny/loose... I see no blood or funny color. I put her by herself in a large dog crate earlier this week. She seemed about the same until this morning she was at the front of the crate looking like like she would like to come out. I let her out and she is now back in the dog house eating some cracked corn that i just gave her. What now? She still seems droopy... tail and wings droopy and puffed up. Every time I go to see her thinking I'm going to put her out of her misery, she looks at me with alert eyes and doesn't seem to be in any pain... except her droopyness. I have looked at and poked at her to see if I see anything else wrong, but see nothing. Things I've done for her... special food as stated above, electrolytes in her water, baby vitamins, isolating her so she won't be picked on. I don't want her to suffer, but I don't know what else to do for her?