Responses
I think usually because the bird people prioritise freedom, they are excited to cast off the burden of being the heir.
However, because they didn't think the king would take on a new lover (it seemed he'd never taken on concubines as yet) and that he was too old to have another child...
Sulkin had made their peace with being completely restricted and so mentally couldn't process their new reality & sudden lack of purpose.
Really the king screwed everyone over.
What do y'all think about having the youngest as the default heir to the throne?
I think it doesn't make sense because what if the king and his partner truly love each other and keep producing offsprings? Or if the king had coveted numerous concubines/lovers? I think it will just garner a worse sense of hostility among the siblings. Imagine all your hardwork will go to nothing just because you're not the youngest anymore.