Standard disclaimer: I’ve never advocated a 100% seed diet for birds. I do believe they can part of a healthy “real food” diet for birds that can contain vegetables, fruits, insects, nuts, and other wild foods.
Whether intentional marketing or not, the pet food industry has always used words like “kibble” for processed dog and cat food and “pellets” for processed bird food.
First off, let’s look at one of the most comprehensive studies on processed food consumption from the British Medical Journal. This article defines what it calls “ultra-processed food” and documents the downsides.
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Ultra-processed foods are industrial formulations made mostly or entirely from substances derived from foods and additives, with little, if any, intact food. [Editor note: Pellets are powdered food and additives, which are then extruded]
Participants in the highest quarter of ultra-processed food consumption had a 62% relatively higher hazard of all cause mortality compared with those in the lowest quarter.