why do small dogs live longer than big dogs
A. It is true that the small, or toy, breeds live longer. The Chihuahua, for example, has a life expectancy of 16 to 18 years. The larger the dog, the shorter its life. Great Danes rarely live more than 8 years.In the simplest terms, there is less strain on the organs (liver, heart, lungs, etc.) of a small dog to keep it alive and much more strain on those of larger dogs.he Chihuahua, for example, has a life expectancy of 16 to 18 years. The larger the dog, the shorter its life. Great Danes rarely live more than 8 years.