What breeding defects do St Charles cavalier spaniels have?

Cavalier King Charles Spaniels are prone to several breeding defects, most notably mitral valve disease, which can lead to heart failure. They also often suffer from syringomyelia, a painful condition where cysts form in the spinal cord. Other issues include hip dysplasia, patellar luxation, and eye problems such as cataracts and retinal issues. Responsible breeding practices are essential to minimize these health risks.