According to the AKC, the dachshund is ranked 13th in popularity among dog breeds in the United States. In addition to back problems, the breed is prone to patellar luxation where the kneecap can become dislodged. In addition to back problems, the breed is prone to patellar luxation where the kneecap can become dislodged. Dachshunds may also be affected by osteogenesis imperfecta (brittle bone disease). When occurring genetically within the eyes or ears, this white mutation can be detrimental to development, causing hearing or vision problems. Other dachshund health problems include hereditary epilepsy, granulomatous meningoencephalitis, dental issues, Cushing's syndrome, thyroid and autoimmune problems, various allergies and atopies, and various eye conditions including cataracts, glaucoma, progressive retinal atrophy, corneal ulcers, nonucerative corneal disease, sudden acquired retinal degeneration, and cherry eye.