It has been 7 days since we found our 3 year old Leghorn in her nesting box. She had been there all day. The other two left the coup to scratch for the day and she never left the nesting box. We examined her and could find nothing wrong-nothing appeared broken or injured. When we put her down on the ground she would not walk. She kept her legs drawn up under her. She would not clutch a roosting pole. We removed her from our coup and made a temporary space for her. She will eat and drink if the food and water is put in front of her but will not even turn her head to reach for food in a bowl. She has not walked in a week. We have never owned chickens before so are at a loss on what to do. The local tractor supply said she caught some disease from opossum droppings and probably has worms in her brain and will not recover. Any one have any ideas?