The lifespan of the Chihuahua is around 15-18 years, making him one of the longer life breeds. There are some health problems and disorders associated with this breed and these include luxating patella, entropion, heart problems, trachea problems, low blood sugar, dental problems, sensitivity to chemicals and medications, and open fontanel. These small dogs have very fragile bones, and owners should take care to ensure that he is not treated roughly or dropped, as this could lead to injury - this is why the breed is best suited to gentler children. The protruding eyes of these dogs also need to be taken into consideration, as they could be easily damaged. Take care not to inadvertently harm the dog's eyes through rough treatment or kicking, and keep an eye out for any infections. The parents of the Chihuahua puppy should have OFA and CERF certificates.