This occurs when the tire is flat: the jelly-like contents belonging to the disc has completely leek out. Chronic conditions, as mentioned earlier, can be caused by various factors. If one or more associated with these symptoms are present, make an appointment to view your dog's professional. https://medium.com/@inspired_kobe_swan_759/best-over-the-counter-eye-drops-for-blepharitis-4baf493d6cec