2 days ago I noticed one of my hens was acting different. She wasn't very active and just laying around while out other chickens were busy pecking and clucking. I went to examine her and she had a small white plastic looking thing hanging from her vent. She also had yoke all over her foot. I did some research and ended up soaking her in warm water. I also decided I needed to go inside her vent to make sure she wasn't egg bound. I didn't feel an egg, but every time I removed my finger yoke came out. The area directly under her vent looks quite bloated. I checked on her this morning and let her out in the yard with the rest of the flock. She seems to be in the same condition. She jumps out of the coops walks around a bit and then just stands there and finally lays down with her tail feather hunched down.