I have an 18 month free ranging barred rock that does a lot of high pitched sneezing or coughing. It seems to always occur after drinking. She has her beak open most of the time, so she seems to be having breathing issues. There is a soft wheeze accompanying her breathing. Her energy level is fine, she eats/drinks just the same as usual and hasn't lost any weight. Her sister might be developing same condition. What is wrong with my hen? Is there a homemade medicine I can give her?