Not all Siamese cats are susceptible to death. Only Siamese cats that are weak and infected with diseases are susceptible to death. The average life span of Siamese cats is between 10-15 years. It is not easy to have the same life span as other breeds of cats. Cat breeds that died. If the Siamese cats raised at home are prone to death, it may be caused by infectious diseases. It is recommended that the owner check whether there is pet virus in the home.