That looks like a poop, but there looks like there is a round worm around it. It is the skinny stringy white thing. How old is your chicken? There could be some intestinal shed, or there could be a little blood in the poop which sometimes can be a sign of coccidiosis, especially if there is more. How is she acting?
Gape worms are found in the throat, are Y-shaped and red. You cannot see them without cutting open the trachea after death, and the chickens with gapes have severe repiratory disease.