Hi, We discovered one of our chickens had been sneaking off into a sand box and laying eggs in there, and now is sneezing and we can hear her breathing although it is quite soft and not raspy or wheezing. She has no eye or nose discharge and is behaving normally but we are worried that she might have silicosis? If she does, what can I do about it? Desperate! Please help, she is a dear chicken and am freaking out a bit!