Hello, I noticed that our australorp has developed a cough. She is still eating and drinking, and doesn't seem out of sorts. The cough does not sound phlegmy and she'll just have one cough here and there. It sounds like a cross between a cluck and a cough. No one else in the flock seems affected. Yet. The chickens have a large (40m2) pen and they are not locked in the house at any point. We do have sparrows that are always on the prowl for dropped pellets but it is winter here so the sparrow numbers have been low. The weather has been chilly over the past couple of weeks (~5-15C) and we have had a fair bit of rain but the chicken house is pretty large (~6m2) so there is plenty of room for her to come inside and stay out of the weather. Does she need antibiotics or are there any home remedies that I should try? What should I be looking for to know if this is a vet visit?