my hen has had raspy breathing for weeks now. She is showing no other symptoms, she is eating, drinking and has normal energy. There is no nasal discharge and nothing coming from her eyes. She is not gasping for air at all. If she is sitting quiet, there is no raspy breathing but when they start running around or I pick her up, she starts getting raspy. I put her on Tylan but had little to no response. Here is a link to a video of her breathing: Does anyone know what this is and how to treat it?