A cockatiel's diet should be nutritionally balanced, with pellets forming about 60-70% of the daily intake. Pellets provide essential nutrients that may not be adequately supplied by seeds alone. The remainder of the diet should include a variety of fresh fruits and vegetables, which can make up around 20-30%, with seeds and occasional treats comprising the final 10%. This dietary composition ensures that cockatiels receive a full range of vitamins, minerals, and other nutrients necessary for optimal health. Always consult a veterinarian for the most appropriate diet specific to your bird’s needs.