Can you post your video on YouTube, and then post a link here? I answered on one of the other threads with some suggestions. I would take a flashlight while someone holds the head, and look inside her beak and throat for anything out of the ordinary. It sounds like she may be wheezing, but stridor is a sound that can be made when there is something (a foreign body, tissue, or mucus) partially blocking the airway, and is heard both on inhaling and exhaling, and is a high pitched sound. If it is a respiratory infection, the Tylan can help, depending on the bacteria. How much Tylan are you giving? 5mg per pound 2-3 times a day is an average dose, but can be increased.