I opt to feed my parrot cooked and sprouted grains, fresh produce, some (healthy) table food and a little seed. I do use Goldenfeast Golden'obles (which are pellets, but the best ingredients I can find) as treats/incorporate into foraging/self rewarding toys. My mom's 3 birds (all healthfully in their 40's) have eaten a produce-heavy diet with some seed and healthy table food their entire lives. A varied produce-heavy diet seems to be a huge contributing factor to a healthy, happy parrot that will live out his or her full lifespan, not a pelleted diet. That's all the "proof" I need that I want to feed my bird, fresh healthy foods as the bulk of his diet. I think that pellets can have a place in a VARIED diet, but IMO, should never be the bulk. To me, a pellet-BASED diet seems like a diet based off vitamin-enriched cereal. It just can't be healthy long term IMO. Though in comparison to an all seed diet, pellets are comparatively healthy. That doesn't mean they ARE the healthiest, and a lot more research would need to be done into them to convince me to feed them in any significant quantity to my bird!