Talk:Drum Bunker Dragon (character)/@comment-24281553-20180407000543/@comment-3974145-20180407015006

Well that scene is supposed to have been years into the future and in the series so far that many years haven't passed.

Also it is possible the eggs didn't all hatch at the same time (there isn't like any real dragons to compare this stuff too lol) so maybe either that heir was the oldest or maybe just the one of the ten Drum felt comfortable making his heir.