I do not like most pellets. I have done extensive research that shows that soy is not good for birds--on a long term basis. It's hard to find a bird food without it though--unless you make your own. All the major pellet brands have the first 3 ingredients as corn, soy and wheat. For some bird species, that may be ok, but not for all. Some need higher grains and carbs, some need more veggies and fruits. I feed Goldenfeast, which is a seed based diet, but they do have a pellet too, called "Golden'obles". THey've discontinued the petite size pellets, which makes me mad, but they do still have a smaller pellet that some small birds will eat. These are high quality pellets, with all natural ingredients and no corn or wheat and I think no soy.
I was adding them to my birds diet, but she didn't eat them very well. I feed the other diets that are a mix of seeds, veggies, fruits, nuts, legumes, herbs, dried egg, etc. My birds do great on it and have phenomenal feathers.