What happens next?

How to deal with obesity in cockatoos
Change your bird's diet.
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.

pick from the following.
[+] Add yogurt to your bird's diet to keep it balanced and to prevent overeating. Feed your cockatoos a legume.;
[+] Obesity is often caused by a seed-based diet, so invest in high quality pellets designed for cockatoos instead of providing a seed diet. Make sure your bird is actually eating its pellets.;
[+] Choose : Seeds dha shredded nuts reduced bran dried fruit's fat content grains tree salt providing bird with whole grain bread high protein grasses hay Remove stress and drive bad behavior into consideration. Birds have anger or mood swings which can be harmful to them.;
[+] Refrain from giving your bird all or most of this food. Make sure to avoid feeding your bird pellets.;
Obesity is often caused by a seed-based diet, so invest in high quality pellets designed for cockatoos instead of providing a seed diet. Make sure your bird is actually eating its pellets.