Unrest at the Nursery! - S15-E47
Question: Why did Vullaby run away from the nursery? Was it because of Layla hurting her feelings?
Answer: To my eye, she resembles a pre-pubescent Barney-like dinosaur, with inexplicable antennae and a case of pink-hued vitiligo. However, as her name implies, she is actually a unique fabrication of the program creators, and reflects no actual animal. The series uses the word "Uniqua" as both the character's name, and the designation for her species.
Answer: Yes it ran away because Layla hurt its feelings.