| The life expectancy of any dog is commonly | | | | aspects. Dogs like humans tend to develop |
| expressed in terms of dog years by us and it | | | | advance muscular features as they grow along |
| depends entirely on the dog's breed, size as | | | | with a similar mental development. Through a |
| well as the dog's surroundings. Various other | | | | major dog study, it has been estimated for |
| factors affect the life expectancy of a dog. | | | | dogs of all breeds and sizes that, nearly "64 |
| A dog's life span changes according to the | | | | percent of dogs" were euthanized because they |
| diet provided to him and also by the number | | | | were affected with some kind of diseases. |
| of medical problems the dog tends to face | | | | Only 8 percent of the total dogs live beyond |
| over the years. | | | | 15 years and nearly 16 percent of them die |
| | | | yearly due heart diseases and cancer. Human |
| The average life span of the small dog like | | | | lives are not terminated even if they suffer |
| Chihuahua is about 15 to 16 years, while | | | | from rare and incurable diseases; and this is |
| medium sized the dogs like Border Collies | | | | the main reason why the lifespan of an |
| have a life span of 10 to 13 years. It can be | | | | average human being is reasonably long. |
| noticed big dogs like Great Dean live up to | | | | |
| only 7 to 8 years. The calculation of the | | | | The effects of aging in dogs is said to be |
| life expectancy of particular dog can be | | | | dormant for several years. But like humans, |
| accurately done with the help of "size or the | | | | dogs to undergo physical changes as well. The |
| specific breed calculator", which is said to | | | | first sign of aging in dogs is said to be the |
| be one of the most accurate age measurement | | | | decrease in its activity levels. The sleeping |
| schemes available. The size or specific breed | | | | period in these dogs also becomes longer. The |
| calculator gives approximate results about | | | | canines experience a drastic change in their |
| the dog's predictable lifespan based on the | | | | skin condition, limb usage, appetite and they |
| size as well as the breed of the dog. | | | | experience tooth loss as well. Their sense of |
| | | | hearing and vision also diminishes gradually. |
| It is generally assumed that, on an average, | | | | Older dogs tend to experience stiffness in |
| "one human year equals to seven dog years". | | | | their body. All these obvious signs of aging |
| This statement may not be appropriate, since | | | | can even be found in humans. The human years |
| the first two years are jointly represented | | | | are extended only because of advance modern |
| by 18-25 years in such schemes and because | | | | medicine and various other drugs that are |
| the entire ratio cannot be generalized for | | | | designed to deal with symptoms of old age. |
| all the dogs though, they belong to different | | | | |
| sizes and breeds. An exact ratio of dog years | | | | Dogs and humans may not have the same |
| vs. human year cannot be formulated. However, | | | | physiology, yet some obvious similarities can |
| some obvious features remain similar between | | | | be noticed when both species age. Dog years |
| both aging humans and dogs. | | | | and Human years may not be directly related |
| | | | by some advance equation, but to the naked |
| It is generally assumed that the human | | | | eye the equivalence of corresponding features |
| equivalent of a one-year dog is supposedly | | | | of Dog years and Human years are quite |
| fully grown by both mental and physical | | | | visible. |