John Francis wrote:
On Thu, Dec 03, 2009 at 05:12:53PM -0500, Doug Franklin wrote:
P. J. Alling wrote:
At 19 he was a very old dog...
For some reason, I have it in my head that the average lifespan for pet
cats is a couple of years longer than for pet dogs.
That's because they are smaller. Seriously (albeit slightly tongue-in-
cheek; different species are not directly comparable). But large dog
breeds have, generally speaking, shorter lifespans than smaller breeds.
Hmmm. That seems strange, to me. Again, going by biology classes a lot
more years ago than I'd really care to admit, I thought that larger
species typically lived longer than smaller species, when considered on
the "gross scale", like hamster versus cat/dog versus horse rather than
hamster versus mouse. As I recall, something about the smaller ones
having higher metabolism or something (e.g., higher average resting
heart rate). Seems like Basal Metabolic Rate (BMR) might have been in
the explanation somewhere. :-)
--
Thanks,
DougF (KG4LMZ)
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