Which breed of dog lives the oldest? Twelve breeds accompany you for a particularly long time. A dog's life expectancy depends on its size.
If you want to enjoy your four-legged friend for a long time, you should choose a small breed and avoid animals that could be affected by overbreeding. Larger dogs age faster than smaller ones and need to be retired sooner. Neutered male dogs also have a longer life expectancy than unneutered ones. By the way, the “dog formula” is only partially correct: seven times seven years equals seven years.