This article takes a scientific approach to avian dietary needs. I don’t agree with the pellet only diet suggestion. I’ve found that Claire lacks strength, energy and emotional vibrancy on even the highest quality pellets when I’ve leaned on them from time to time. However, this article addresses all options and the totality of information provided is valuable in creating a diet plan for your parrot.

University of Florida, Institute of Food and Agricultural Sciences Extension outreach is a partnership between state, federal, and county governments to provide scientific knowledge and expertise to the public. The University of Florida (UF), together with Florida A&M University (FAMU), administers the Florida Cooperative Extension Service.
— Read on edis.ifas.ufl.edu/publication/vm067