Recently a Sultan of ours started to act drowsy, unstable and generally ill. We had a sharp weather drop, which is what I assumed was the cause, as these birds aren't hardy. I also guessed this to be eggbound, as she displayed all the symptoms, but I was incorrect on that guess. She felt too thin to me, which could also be a big problem in colder weather (40s at night, 60s in the day). I've given her calcium, a small dose of aspirin, and poly-vi-sol in addition to food and water. Along with keeping her inside under a heat lamp, she has perked up; though, over about 3 days. I am not sure if that's considered a quick recovery simply from being cold, which leads me to think that maybe it could be something other than just shock from the cold? Perhaps not, but I would love to hear of others experience. I figure she could have been slightly hypothermic, as her feet were cold and rather colorless. Anyway, some feedback would be much appreciated. Also--does anyone know of any cheap heating systems for coops? We were looking at uv panels and lights, which cost around 100-300. Not too bad, but I'm always looking for good deals! All of our other chickens/ducks are hardy birds.