These are the scary little things that appear on the back of
pet food bags. Most of the time we want
to avoid them since we really don’t want to know what is in most dog foods. And
yes, they are written in English, but, unless you have a chemistry degree, you
won’t understand half of what is written anyway. However, be brave and realize that taking the
time to figure it out, may be the key to
saving your dog’s life.
Pet food manufacturers list ingredients on the label
starting with the highest concentrations first.
That means we want to see things like beef, chicken salmon etc as the number one ingredient.
The protein sources should be the number one listing for dog food. Stay away from foods that are high in
by-products. These are also protein
sources, but are of inferior quality to actual ’meat’. You will see a phrase called “crude
protein“. This does not refer to the
type of protein used. It refers to the method used to analyze the total
protein. The percentage of nitrogen content is measured in a lab. It is then multiplied by 6.5 to give the
percentage of crude protein.
The two most
important factors are not measured. These are the biological value and the digestibility. Biological value refers to the amino acid
composition. Amino acids are the
building blocks of proteins and need to be in correct balance to be useful to
the body. Digestibility determines how
well the GI tract can absorb the protein.
It is very hard for the gut to break down the protein in meat
by-products. By-products are things
like hair, feathers, feet, tendons - I’m sure you get the picture.
Meat and bone meal are other forms of protein listed on
labels. This is ground bone, gristle,
tendons and anything not fit for human consumption that has been through the
rendering process. We discussed the
wonders of rendering in the last article.
Anything on a label that says any kind of meal be it lamb,
chicken, beef or fish is the cheapest and least nutritious form of protein. So
we can see that the source of the proteins are not readily available on
most labels.
Grains are other ingredients listed. They are not all bad for dogs. Some vegetarian forms of dog food contain
lots of grains. But overall, we would
like to see these are secondary ingredients in most dog foods. The grains used need to also be of good
quality since the availability of nutrients is dependent on the digestibility
of the grain itself. We want to see whole
grains not pet grade, inferior quality products containing mold and
endotoxins. Pet food manufacturers will
also use a variety of ‘spent’ grains as fillers containing very little
nutritional value Spent grains include:
Rice flour- the end process of the milling of
rice
Corn gluten meal- left overs from corn
processing after the removal of the nutritious layers
Brewer’s rice- discarded rice from the
manufacturing of beer
Additives are used to make commercial dog foods to extend
shelf life and to make them attractive to the human consumer. They can be added by the supplier and then
again by the manufacturer. The law does
require investigation on the direct effects of additives and preservatives, but
what about the combined effects? We know
very little about the synergistic effects of all these chemicals.
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