Petfood Industry - April 2018 - 61
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of soybeans. Increasing protein supply is essential if
There are also some bioactive proteins found in
we're to feed the nine billion people (and their pets)
soy. Of most concern are the protease inhibitors (e.g.,
who will be inhabiting our planet in the next 30 years.
trypsin inhibitors) or the phytohemagglutinins (e.g.,
Beyond volume, soy proteins are relatively high
lectins). These are denatured (inactivated) by the
quality compared to other plant-based sources.
cooking process. They are not an issue in conventional
Soybean meal does lack adequate methionine for
pet foods that have been extruded, baked or canned.
maximal animal performance, but it has a surplus of
They would only be of concern in a raw food diet.
lysine, which serves as a great complement to cereals
Soybean meal also contains appreciable oligosacas a counter balance. Even LID (Limited Ingredient
charides like raffinose and stachyose. These nonDiet) formulas rely on protein-carbohydrate pairs to
structural polysaccharides can be good in moderation.
work in concert. Said
another way, pet foods
Looking back: Why aren't pet food manufacturers
are not single ingredients
so we shouldn't judge a
on the soy bandwagon?
single ingredient against
There are storage
Soy uncommon in dog and cat foods
proteins in soy that can
however, soybean protein
is no more antigenic than
any other plant-based protein. Peas and lentils are also
We often describe some classes of these compounds
members of the legume family with similar storage
as prebiotics. However, there is such a thing as too
proteins - they aren't somehow magically different
much of a good thing, which is certainly the case for
regarding their diet hypersensitivity. Any protein can
the NSP found in soybean meal - if you want to avoid
be antigenic under the right circumstances. Most of the
flatulence and soft stools. But are they bad for health?
literature would suggest that the animal-based proteins
Certainly not; they are just a pet-parent nuisance.
are more likely culprits than cereals and legumes.
Most pet food companies use soybean meal in "judi-
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Industry April 2018