Well, the chick grew up into a chicken, but you’re still not sure how the egg got into that cave...

Llama Llama Duck's name is what happens when the sibling of the human in charge gets a song on her head and sings it near an unnamed chicken. Since then, Llama only responds to that name, regardless of the human's efforts to change it. The dragons in the clan don't share that frustration, though, and sing that song all day to make Llama come, flapping her wings and leaving feathers everywhere. It got so bad that the alpha had to threaten to punish the next one he caught singing. His main reason was that Llama could exhaust herself to death from so much running around thinking dragons were calling her, but everyone knows it was because he was tired of hearing the same song over and over again.