Dog Life Span vs Human Life Span

It is said that human lives 7 times as long as dogs.
Therefore each year of a dog's life is equal to 7 years of a human's life.
This is not accurate mainly becosue of two reasons:

- The longest-lived breeds have an average lifespan which is double that of the shortest-lived breeds.
- The small breeds have a relatively shorter childhood as they have a total life span of around 15 years and they reach maturity by 1 year.

The following table tries to give a relative life span of dogs based on the size (weight) -

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Redesigned by elhusseiny