I feed Sugar Pellet-Berries for her first and last feeding of the day. She absolutely loves them too! However, she's big on variety, so we give her a mixture of Harrisons Coarse and Zupreem Naturals.
Too's really shouldn't have seeds. I'm a non-fan of seed diets for any bird, however Too's are very very prone to Fatty Liver Disease and most are considered borderline. They do need nuts, but seeds are really a no-no for Too's. I'd suggest pellets as a staple diet, and include nuts a few times a week along with fresh fruits and veggies daily.