I have a flock of 15 geese and 16 hens/pullets. They all are in or just finishing a heavy molt. About two weeks ago, it got very cold pretty fast here. We lost a gander one night, and I assumed it was from the cold, because I had seen no symptoms of illness. A week later, one gander and one pullet came out of their coop in the morning, unable to walk without falling over. It looked as if they couldn't find their balance, and would try to use their wings and tails to stand up straight. They would finally settle on their bellies, sometimes with wings extended, while the other birds were milling about. Eating/drinking happened as normal. They were vocalizing as normal. There were no unusual head movements, no other signs or symptoms. The gander seemed to regain his balance and was acting fine these past three or four days, but we found him dead this morning. At this point, I'm just trying to keep the pullet alive, but she is getting weaker. She is going through spells where she can't even hold her head up. I noticed today that she has very little muscle/meat on her breast. I've seen this mentioned elsewhere as a sign of disease...Which one, I'm not sure. She now can't even seem to tuck her legs under her--they're sticking straight out with her feet curled. It almost looks like some kind of paralysis. I'm having a hard time getting her to drink her vitamin water. I really don't think she's going to last much longer, but I'm putting this out there in case someone has a last-ditch effort I could try? Or any ideas about what is going on, so I can keep this from happening to my other birds?