User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-10613301-20131209013014/@comment-4009941-20131209030148

I think its possible that the other pack members can be adult but maybe go through more changes with older age or given leader status.

I once had a group of pet chickens, they were all adult but only one male had a crest. Once the lead male died the second placer started growing a crest. I was in shock of how this works and I still don't know how this works. I got them all the same age even when I raised them from chicks.