My conures eat TOPS (small size), Zupreem natural, and a little bit of Zupreem fruity as treats and in foraging toys. I tried Harrison’s, Roudybush and Goldenobles as well, but had difficulty getting them to eat those. I think they just have their individual preferences - I just chose the best foods that I could actually get them to eat. Mine also eat a lot of chop, and seem to prefer it to pellets. I leave pellets in their cage all the time for grazing.