Maybe Craig can help me here. Anyone is welcome to take a shot.

1-1/2 inch wiffle balls with rattling beads inside and a leather thong tied through each end were among the toys in Lucy's can of tricks. She hates them. She attacks them violently with her beak and throws them off the cage, in a not playful way.

She doesn't like other balls either - little balls, big balls, hard balls, soft balls. No balls for Lucy. Is there an explanation?