[header] How to deal with obesity in cockatoos [title] Change your bird's diet. [step] Cockatoos need a diet comprised of 65% to 80% pelleted food and 15% to 30% vegetables. Seeds and fruit should be given in moderation only. 
Obesity is often caused by a seed-based diet, so invest in high quality pellets designed for cockatoos instead of providing a seed diet. [substeps] Make sure your bird is actually eating its pellets.