Hi, I am sorry but I feel likie my computer is about to crash because it is running verrrrrry slow so I haven't looked up this problem beforehand. I noticed today that the hens all ran to one spot in the coop so I went to investigate. They were eating what looked like raw egg. Our hen Bonnie was there, with a yolk soaked tush. So I brought her in and saw that the egg shell-very soft obviously- was still in her vent. I took it out and I also noticed it seemed like her balance was a bit off, tipping forward and droopy tail. She is congested. Clumps of yellow mucus? I guess around her nostils. What ever it is, it looks different than the mucus I have seen before. This is also the bird that I had to treat with Cocci a while back. I haven't seen her poo today and she doesn't seem to have lost weight. Please advise.