Photo and video here:
1) What type of bird , age and weight (does the chicken seem or feel lighter or thinner than the others.)
Salmon faverole, 14 weeks
2) What is the behavior, exactly.
She is spreading her wings slightly ("hulking") and crouching and tucking her butt under, barely moving around, not running with the other chickens. She hardly moving around at all. I noticed about an hour ago when I went to let the flock out and she stayed in the coop. If she was human, I'd say she's trying to poop - I think she still a little young for laying eggs, but I'm a new owner, so I'm not sure. Seems alert and distressed, managed to sprint outside when I was sprinkling some scratch, but didn't eat and went and hid under the coop.
3) How long has the bird been exhibiting symptoms?
1-2 hours? She was up on the roosting bar when I went to bed last night.
4) Are other birds exhibiting the same symptoms?
No
5) Is there any bleeding, injury, broken bones or other sign of trauma.
No
6) What happened, if anything that you know of, that may have caused the situation.
No idea
7) What has the bird been eating and drinking, if at all.
Can't tell yet
8) How does the poop look? Normal? Bloody? Runny? etc.
I found one poop that looks like photos of "intestinal lining" (slightly bloody), but I don't know which hen it is from
9) What has been the treatment you have administered so far?
None
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?
Prefer to do it myself
11) If you have a picture of the wound or condition, please post it. It may help.
Photo and video here:
12) Describe the housing/bedding in use
Pine shavings
1) What type of bird , age and weight (does the chicken seem or feel lighter or thinner than the others.)
Salmon faverole, 14 weeks
2) What is the behavior, exactly.
She is spreading her wings slightly ("hulking") and crouching and tucking her butt under, barely moving around, not running with the other chickens. She hardly moving around at all. I noticed about an hour ago when I went to let the flock out and she stayed in the coop. If she was human, I'd say she's trying to poop - I think she still a little young for laying eggs, but I'm a new owner, so I'm not sure. Seems alert and distressed, managed to sprint outside when I was sprinkling some scratch, but didn't eat and went and hid under the coop.
3) How long has the bird been exhibiting symptoms?
1-2 hours? She was up on the roosting bar when I went to bed last night.
4) Are other birds exhibiting the same symptoms?
No
5) Is there any bleeding, injury, broken bones or other sign of trauma.
No
6) What happened, if anything that you know of, that may have caused the situation.
No idea
7) What has the bird been eating and drinking, if at all.
Can't tell yet
8) How does the poop look? Normal? Bloody? Runny? etc.
I found one poop that looks like photos of "intestinal lining" (slightly bloody), but I don't know which hen it is from
9) What has been the treatment you have administered so far?
None
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?
Prefer to do it myself
11) If you have a picture of the wound or condition, please post it. It may help.
Photo and video here:
12) Describe the housing/bedding in use
Pine shavings
) or any of the many illnesses chickens can get. Just push fluids, check for injuries? See if she'll eat some scrambled eggs. 
