1) What type of bird , age and weight (does the chicken seem or feel lighter or thinner than the others.) Golden Comet, almost two years old, normal weight (she's the 'biggest' in size, but lighter than her dense RIR & Leghorn sisters) 2) What is the behavior, exactly. Yesterday I noticed she was not running to eat. She's my best eater, so that's when I knew something was wrong. She was just hanging out under the stairs. After watching for a bit realized she was separating herself because she didn't feel well. Was really limp when I picked her up for examination. She sounds kind of wheezy and no gurgley and is breathing open beak. Her crop is soft, but no sour smell to indicate sour crop. Eyes still clear and observant, but a little sad/vacant. Barely 'talking'. Still has spurts of energy, but retreated twice before I could set up her infirmary to the coop to lay down in a corner. 3) How long has the bird been exhibiting symptoms? A day. 4) Are other birds exhibiting the same symptoms? No, other two appear fine. 5) Is there any bleeding, injury, broken bones or other sign of trauma. No, checked first thing. 6) What happened, if anything that you know of, that may have caused the situation. Unknown. 7) What has the bird been eating and drinking, if at all. The girls free range and eat organic scratch, feed and table scraps. Recently ate some old oats we found that we're housing to meal worms? That was the day before yesterday's 'snack'. Since inside I've gotten her to eat some hard boiled egg (a favorite) and drink some ACV water. I added acidophilus tablets to food since I had no yogurt. This was last evening. This early AM I checked on her and while she got up to drink I noticed she was trying to 'eat' something in her water. Turned the light fully on and she must have vomited into it. Kind of yellowish, similar to human bile, but a little thicker, so still has shape/form in water. Was thirsty, but changed water quickly & it didn't happen again. 8) How does the poop look? Normal? Bloody? Runny? etc. Poop is thick white, with normal green. Kind of like when a chickens dehydrated, but much thicker, like white resin almost. 9) What has been the treatment you have administered so far? Brought her inside to rest for the night. She's pretty mello, but after a few bites of food gets a burst of energy--looking around wanting to see out of bin. 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? I can't afford a vet, but she once and a bacterial infection when ten weeks old, and I think I can find the meds at my local feed store. I've read through myriad posts, but she has part, but not all symptoms of major illness. 11) If you have a picture of the wound or condition, please post it. It may help. I can upload in late AM. 12) Describe the housing/bedding in use. Straw. Thanks lovely community! My little Samantha is such a sweetie. Additional info, she is at the end of pecking order. Middle sister pecks at her, top sister leaves her alone and or comes to the rescue and stands between the two. It has become a little more frequent so maybe stress is making whatever it is worse. Also comb and wattle good red color, she doesn't "look" ill, but behavior definitely indicates such.