Hello! i have a sussex light hen that has gone off of her legs and i am not sure what to do with her. about a week ago she was walking like she was drunk but about 4 days ago she started just sitting about, like she cant use her legs at all. we have been leaving her inside the coop going out every now and then to check on her and giving her food, she doesnt appear to eat much, but we leave the food out with her and its gone the next time we check on her, but it could be the other hens eating it (though they normally spend the day shut in the garden and nowhere near the coop). today i went out to check on the hens to find her outside the coop on her side in the rain unable to get up! (shes obviously managed to get up and walk out of the coop on her own and we think she may have gone to get a drink of water) i got a towel and brought her in (gave her a wash as she was covered in muck off of the floor!) and sat her wrapped up in a blanket to get warm, as she was very cold when we found her! she seems very alert, looking about at all the strange 'house' noises, but if we sit her on the floor she tries to move and rolls onto her side. i dont know how old the hen is as she came with the house when we moved here about 2 months ago (with 3 others and a rooster), we have previous experience of hen keeping and brought our coop with us with the intention of getting more hens, but dont want to get any at the moment with our sick hen. also not long after we moved in we had a hen die, she was limping and was told that it was due to a dog attack, she just got weak and died, and because of this im thinking we may have mareks disease? any advice please? is it ok for her to continue to sit in the coop with the other hens?