If you place the egg in certain environments or surround it with certain blocks it will change the breed while it's incubating/hatching.
Also, has anyone tried this mod with Biomes O' Plenty? I'm trying to find a Nether dragon nest, but haven't found one after over an hour of searching with flight. I might just be unlucky, but there may be a conflict in generation here.
I've searched without Biomes O' Plenty and Natura active, and still no sign of a nest- what is the in-game name of the nether nest structure? (for the Locate command)
I removed all other mods and did manage to find Nether and Overworld nests. If possible, could the config be expanded to allow players to add more biomes for each nest to spawn in?