I don't see anything out of the ordinary, just an icky chicken poop. Type "chicken poop chart" into the search bar, a wide range of stinkies are acceptable
I think it's a cecal poop. It happens every 10th poop or so. It's waste that comes from their digestive tract (the cecum). It's normal but they do smell.
Speaking about goodies! Last year I gave the girls beet greens and the skins of boiled beets. They scared the heck out of me. Their poops were bright red like they were bleeding. Took a minute for me to remember what I had given them to eat. Lesson learned.