 They may suffer from heart disease, especially subvalvular aortic stenosis, and cardiomyopathy and joint diseases, including patella luxation, osteochondritis, panosteitis, and cruciate ligament rupture.Their long hair also gets knotted up under the ears and longer hairs on their belly and legs if not groomed, these dreads can be cut out with scissors with slow rapid cuts.They can cause pain and discomfort and if left too long will get more matted.