Does anyone have any ideas on what this might be and how to treat it? 1) What type of bird , age and weight (does the chicken seem or feel lighter or thinner than the others.) Ameraucana hen, 4 years, 1.86kg (4.1 pounds) , very thin compared to others. 2) What is the behavior, exactly. Standing next to food with eyes shut, depressed, fluffed up and very weak. 3) How long has the bird been exhibiting symptoms? Just noticed. 4) Are other birds exhibiting the same symptoms? No. 5) Is there any bleeding, injury, broken bones or other sign of trauma. Has a large abdominal mass about the size of a tennis ball. It's somewhat firm, like a tennis ball. 6) What happened, if anything that you know of, that may have caused the situation. Nothing that I know of. 7) What has the bird been eating and drinking, if at all. Has had access to fresh water, scratch, lay pellets and free ranges, but not eating now and crop is empty. I try to make sure that all birds are eating when I feed, but it's hard to check all of the free rangers, so I don't know when she ate last. 8) How does the poop look? Normal? Bloody? Runny? etc. Have not seen any yet. 9) What has been the treatment you have administered so far? None yet, just found. 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? Will treat at home. Can bring inside, give sub-q fluids, tube feed and have most medications on hand. Will not be going to vet. 11) If you have a picture of the wound or condition, please post it. It may help. Will post later. 12) Describe the housing/bedding in use Free ranges on 7 acres and roosts in tree. Also has access to a shed to roost in.