Hello, we have been scouring the net for informations about what is going on with our hen. She's a 6 months old, speckled sussex, very outgoing, curious and fluffy. 5 days ago she started acting funny... She currently weighs 2.8Kg. She seems to have good apetite and will drink a plenty. I looked up Coccidosis, Mareks and looked for lice and mites and see none of the symptoms we have here. No mites or lice to be seen. I felt her crop a couple of times and it's soft. They haven't been foraging much in the last month because of the snow. The only weird thing they ate is styrofoam, about 6 cubic inches out of 5 hens. The hole was shut off the morning after we discovered them eating the ceiling insulation in the coop. That was 4 weeks ago.... We can't figure out what is wrong.... The others are in top condition.... She will fall off the roost and has started sleeping at the bottom of the coop. She walks on both legs and both wings are fine. They are fed laying feed. We had some yellow powder vitamins in their water a few weeks ago. Is it contagious? Should we take her out of the coop? Should we consult a vet or is it home curable? She's our kids favorite one so I'd like to save her... Video and pictures: https://goo.gl/photos/72tGEagr9R415dvt9 Thanks!