Kooky replied in general that we need to breed the first two dragons to get the third dragon.
This post has two meanings:
Either we have to breed the first two dragons to unlock the third (to have the possibility to breed the third with various combinations) or we have to bread the first two dragons
each other to get the third.
That's why me, hiabarara and some other players asked for explanation in some previous posts
I think we need to bread the first two dragons each other, but for sure we will see it when it comes