Not sure if this has been discussed before, but if you know Pops, ... it really don't matter.
However, with all of the health issues / problems dogs seem to be having, which may or may not be cured with the many present dog foods available to us.
How did the dogs (prior to our present time) survive, say a hundred years an beyond, say to the ice age? .... Well may be not as far back as the ice age, but you know what I mean?
Anonymous