Harrison's are great pellets...If you guy takes to them then great...However, if he doesn't, I recommend trying Tropican pellets, or the Tropimix seed-mix, which also contains the Tropican pellets. I switched over to Tropican/Tropimix a year ago from Zupreem Natural and Vita Prima seed mix, and both my Quaker and my Green Cheek love both the pellets and the seed mix (which has no sunflower seeds and contains a ton of different dried veggies, fruits, legumes, grains, etc.) And it's nice because the Tropimix contains the Tropican pellets too. The Conure/medium bird formulas are what I buy for them, and my Quaker just gobbles them up. They were recommended by my CAV...So if the Harrisons doesn't fly, or if you haven't found a good, healthy seed-mix without sunflower seeds, try the Tropimix seed mix (he should still get a healthy, low fat, varied seed mix every day in addition to his pellets).