A dog is 12 years old which is equivalent to how old a person is
There is a rough correspondence between the age of dogs and the age of humans, but this correspondence is not linear because dogs grow at different rates than humans. Generally speaking, dogs grow very quickly in the first few months of life, then gradually slow down, and by adulthood, the dog's body size and physiological characteristics are basically stable.
According to the general correspondence, the 12-year-old of a dog is roughly equivalent to about 60 years of age in humans. This means that a 12-year-old dog can be considered "old". Of course, this is only a rough estimate, as the growth rate and lifespan of dogs of different breeds and individuals may vary.
For a 12-year-old dog, its body functions are not as strong as when it was younger, and there may be some health problems specific to older dogs, such as joint pain, cataracts, hearing loss, etc. Therefore, for an elderly dog, the owner should pay more attention to its health and give more care and affection.
Also, although dogs have a relatively short lifespan, with a sensible diet, proper exercise, and regular medical checkups, owners can extend the dog's lifespan and keep it healthy. For an elderly dog, the owner can provide it with easy-to-digest, low-fat, low-sugar, high-protein food, and take it for walks, play, and check-ups regularly.
In conclusion, although the correspondence between a dog's age and a human's age is not completely accurate, a rough estimate can be used to understand the age stage of a dog and take care of it accordingly.