Hi. I have 4 chickens. Two Plymouth Rocks and two Americanas. Recently I noticed my one Americana sleeping in the neat instead of the roost. Then I noticed it seemed like she could not bear weight easily on one side and would start to fall over however she was still walking and running. I also at this time noticed when she would come down from the coop in the ramp she would stumble. Then yesterday I noticed she wasn't bearing weight well on the other leg either and fell over. Now today when I opened up the coop she did not come out and stayed in the nest. Later she do come out and is just sitting under the coop with her feathers ruffled like she is cold but she won't move. I let he others out to free range and threw some treats on the ground for them and she still would not move. My husband picked her up and she squirmed a bit but when he put her down she wobbled like she was drunk and then sat back down. I'm totally worried. I called the local fees place and they said I need an antibacterial powder to put in the water and she might come through, they said they have seen it before but couldn't tell me what it was. I figured I would ask you all. The other 3 do not seem to be affected by this at this time. Anyone know what it is or what to do?