Well, the title pretty much covers it. I have a hen who has had poop clinging to her feathers for several weeks now. I've noticed that she strains a lot to poop. She's too wild to catch easily, but today I was able to grab an approximately 1 inch diameter piece of poop hanging off her feathers near her vent. As all good chicken owners do, I took a whiff, and man did it smell. Something more like horse or pig manure. It was very dry. I looked with a magnifying glass and didn't see any evidence of worms, though there were a few bits of undigested food particles. She has only been on a diet of organic layer crumble with dried meal worms as treats for the last couple weeks. Prior to that the only other treat she would get regularly was sunflower seeds late in the day before roosting, but I decided to stop that in case it was causing the constipation. Other occasional treats were raisins, about five per day, but I also stopped those.
It's cold here now, so the messy feathers below the vent aren't a fly issue, but come spring and summer, I'm sure this will be a problem. She's never been the most dynamic chicken, so standing around a lot is her norm. Her tail is not down and she's not hunched up. I have seen her eat an occasional feather off the ground. She is in with one other chicken now who is the top hen. There was one other hen with them last fall who was the top hen, but she fell ill and has been separated from them for three months now. They have two separate feeders, so she has opportunity to eat without being picked on. I do see her drink. The run is sand and dirt with some leaves in a corner to take a little chill off their feet.
Any thoughts about this stinky poop problem would be appreciated.