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agrarian condition.
In the case of dogs, we've found a few genes that
reflect this adaptation. So, too, have we found genes
that indicate a neurologic adaptation to cohabitation
with humans. But just a few genes' difference is
regarded as an adaptive shift to a condition.
These alone can't possibly alter the entire
digestive evolution of a species.
• Dogs' teeth are adapted to a carnivorous
diet [for tearing muscle and crunching
bone to extract marrow).
• Many of their innate behaviors are
carnivorous in nature. Consider digging, for
example. Like wolves, dogs dig to hide parts of
meals for future ingestion.
• Dogs, like many large mammalian carnivores, are
metabolically able to survive for long periods of time
between meals.
• Dogs have a lot of flexibility in metabolic
pathways to help make up for a feastor-famine lifestyle and a wide range of
possible prey.
WHY IT'S IMPORTANT
But the issue is this: Just because dogs are
a domesticated species with an adaptive
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Accepting "this explanation derived from feeding ecology,"
offered Dr. Hendriks in his final statement, "helps to improve
our understanding of the dog's digestive physiology
and metabolism and may contribute to the
ongoing optimization of foods for our pet
dogs."
But that doesn't necessarily mean we'll be
moving away from a grain-based diet for
most dogs anytime soon – in fact, most
will probably never experience the potential
benefit of what may be a more biologically
appropriate diet. There are simply too many
issues related to sourcing meat proteins to
make that feasible.
Indeed, dogs still have plenty of traits that
are 100 percent carnivorous:
The result of these findings, argues
Dr. Hendriks, is that the dog is undeniably a
true carnivore. The dog just happens to have
an adaptive metabolism as a result of living
with humans for millenia. That's why the dog is
perfectly capable of eating a grain-based diet,
as most commercially fed dogs do.
metabolism that allows them to cope with life as an
omnivore doesn't mean they're not true carnivores.
Nonetheless, knowing what a dog's ideal diet looks like
is the foundation of any nutrition program. But whether
creating a diet based on the ideal is doable or not is another
issue altogether. v
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September 2014
Newsletter of the SOUTH AFRICAN VETERINARY ASSOCIATION
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•
From the President I Van die President
FEBRUARY/FEBRUARIE 2015
August 2014 Augustus
The Monthly Magazine of the SOUTH AFRICAN VETERINARY ASSOCIATION
Die Maandblad van die SUID-AFRIKAANSE VETERINÊRE VERENIGING
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