My bird is having a really hard time eating. He tries to take a bite but the food just shatters and goes just about everywhere but in his mouth. I take him to Animal Medical Center and they said that his beak is fine and doesn't need to be trimmed. We have also tried different sized bird food. He eats Harrison's High Potency because he is a bit under weight at the moment (he has always been under weight but this food seems to be helping). Is there something we can do to help him?