We already have purebred cats at home. Take good care of them, immunize and sterilize them in time. If you want to buy them, please think carefully about them. Purebred cats, especially the so-called purebred cats bred in China, need more energy to care for them. 1. Persian system includes Persian cat, hetero short, Himalayan and jinjila (details) polycystic kidney failure, as well as respiratory and lacrimal gland problems caused by special short nasal tube. 2. As long as the cat with folded ear carries the gene of folding ear, including folding ear and standing ear, whether it is folding ear with folded ear, folding ear with English short, or folding ear with American short, there are skeletal genetic diseases. Cartilage and bone development is very common, which can’t be predicted and cured. Once it happens, the cat will die in pain. In addition, as with the British short and the United States short, there are heart problems, the more common is sudden death caused by myocardial hypertrophy. 3. Cardiovascular problems in the United States and Britain, but the existing medical technology can not predict the disease. In particular, the American short male cat, may have congenital heart disease and myocarditis, will sudden death, generally onset in 1 to 3 years old. 4. Because of congenital heart disease in Maine cats, stress can lead to death. In addition, it is easy to suffer from renal failure. 5. Russian blue cats are prone to renal failure. 6. Curly eared cats, like folded eared cats, are incurable bone diseases. 7. Siam is prone to renal failure, eye, mucopolysaccharidosis VI, mesenteric tumor, allergic bronchitis (asthma), childbearing difficulties, stillbirth, lymphomas, etc. in addition, modern Siam bones, especially pelvic and tail, are prone to bone problems. Siam pelvic cavity is easy to have problems, but it is generally not serious enough to endanger life. What’s more terrible is that the skeleton is too narrow and long, which leads to the chest cavity is too small and suppresses the organs in the chest, leading to a variety of organ problems, which will become a fatal factor. Breast cancer is common in non sterile cats, 80% of which are malignant tumors. It is the third most common tumor in the cat family. Most of the cases with breast cancer are female cats over 6 years old, and Siam and hawksbill are more likely to get breast cancer. Breast cancer is very rare in sterilized female cats, especially those who are sterilized before the first estrus. Early sterilization can reduce the risk coefficient by 7 times. 8. Eastern short and Abyssinia are prone to renal failure.