I wonder if there's some kind of pathogen that's contributing to a pandemic of what I believe is peritonitis. Symptoms are only affecting my older birds. Young black sex links have just started laying and are just dandy, but a group of older birds are exhibiting symptoms of unease.
Summer 2012 I saw a chicken with an outrageously poopy butt dreadlock which I cleaned up for her. A week later she was displaying clear signs of distress including this: hen not "squatting" in the "egg pops out" laying stance, but instead holding her body at low horizontal with the vent gently and rhythmically pulling down as if she is going to poop. No poop. I isolated that bird and examined her, checking for egg bound. The whole fluff felt tight, firm, swollen like there was fluid in there or something. Her droppings were "stress" droppings, watery with bits of normal fecal matter. Within a week of confinement I found her on her back, dead, with a puddle of stress droppings accumulated in her upturned vent. Her posture and symptoms were not related to a truly egg-bound hen that I culled last year--post mortem exam confirmed her plight.
This has been the only actual death in the flock, but 6 other hens of her age group (2.5 years) have been displaying similar postures at various times. They forage, but are very probably not laying based on vent shape and moisture. I observed one hen in this group actually laying a "rubber egg." Another hen in this group (who I isolated for observation last summer as well--laid 2 eggs while in confinement) actually "pooped" an egg yesterday in the yard; I saw this happen. Absolutely bizzare--there was no shell at all, not even a rubber one--and disgusting, too, as other hens recognized the goodies and started cleaning it up.
The main symptom, aggravating my mother's intuition to no end, is that they seem depressed emotionally, spending a good deal of time quiet and still, heads pulled in, sometimes a little chilled. There are no signs of respiratory illness that I can see--no discharge, no labored breathing. The affected birds are in various stages of molt, but this has been going on so long that I don't think it's molting-related. Whatever this is, it's sub-lethal and persistent--with the exception of the first, dead, bird.
The affected birds are all hatchery birds, although 3 of my home-bred mutt birds (likely the offspring of some of the affected birds) are 1 year younger and displaying similar symptoms. I plan on culling them all when we get our equipment in order and we get a warm day. I just want to find out how to head this off in the future.
Anyone have a similar tale of woe?