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| "Expanded" diet? |
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Although some bird food manufacturers refer to their product as a pelleted diet, they are actually an expanded diet.
The expanded method is used in order to provide their customer (not necessarily their birds) with foods that come in a
variety of attractive shapes.
In the expanded process, once the ingredients are ground and mixed, the mash is cooked at temperatures exceeding 300 degrees.
The resulting gruel is then forced through very small, shaped openings (to provide different shaped morsels). Once this extruded
gruel hits the air, it expands to many times its size. Because this expansion will not happen when fiber and fat levels are
at the bird’s optimal levels, these ingredients are limited. The limitation of fat is often compensated for, by spraying fat
onto the outside of the morsel after expansion.
The main problem with the expanded diet is that many heat sensitive nutrients are compromised during the manufacturing process.
Using higher heat makes it necessary for the manufacturer to overcompensate to avoid a nutritional loss or imbalance.
Overcompensation leads to guess work; one is never really sure of what or how much has been destroyed.
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