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Why do little dogs live longer then big dogs, when normally large animals live longer then small ones?
Filed under: enart.cgnq.com — smith @ March 16, 2010 edit
  • I was thinking about this a while ago. So normally how it goes in the animal kingdom is that larger animals for example Elephants will live longer then mice. I've heard that it all depends on the number of heart beats, an Elephant's heart beats only some 30 times a minute while a mouse's beats up to 120 times a minute. i'm not sure if that's right, but anyway.

    this seems to hold true for most of the animal kingdom, except for the dog. a great dane will only live 12 years tops and a terrier could live some 16 + years.

    Why is that?


  • They have less heart problems. Skinnier people live longer too. Very tall people don't live long.

    Dogs come from wolves. When they get much bigger than wolves they are reaching a size their basic systems were not meant to support.

    Parrots live a long time. They are not all that big. And tortoises outlive elephants, even though they are much smaller. Bigger animals tend to have to live longer in order to reach their appropriate size to have offspring, and must watch the offspring until they get to near the appropriate size. Often they have less offspring too, so they often have to live longer just to reproduce.

    For instance an elephant will be pregnant for something like 2 years, and the baby won't leave its mother's side until like 3 more years? And that is just one calf. So elephants have to live a long time just to replenish their numbers. But it could very well be that smaller elephants (when not killed) would live longer.


  • dogs, belonging to one genus,statistically have the same life span,
    irregardless of size.
    elephants and mice share an entirely different genus.


  • well little dogs move there body more easily then bigger dogs......like someone being overweight....and someone being a normal weight..............also dogs that are smaller have a faster heartbeat .....less stress is on the terriers body becuz it is lighter


  • From what I understand, a bigger dog's large, heavy frame is harder on them than a small dog's. (It may be harder on their hearts, too, since the heart would work harder to pump blood further). It could also be because smaller dogs live indoors more and mostly live lives of leisure, while bigger dogs are more likely to be outside or "working" dogs.








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