You might try soaking some pellets in water or unsweetened fruit juice to soften them. That often works when converting a parrot to a pellet-based diet, and can sometimes help with any parrot reluctant to eat pellets. My adopted CAG Scooter went on a pellet strike for a while, refusing to eat her favorite ZuPreem Fruit Blend pellets, or any others (I tried QP Ralph's Higgins pellets and a sample of Harrison's I got from a pet store but they only got tossed out). I soaked a few pellets and put them in Scooter's dish, and they were a big hit. She and Ralph both enjoy a few soaked pellets every day, along with their dry ones.