Dogmatix (in French : Idéfix) is a fictional tiny white terrier dog who is a companion to Obelix in the Asterix comics.
Dogmatix is the only animal among the main characters of the series. His role is minor and funny in most of the stories, significant mainly as a 'bone' of contention between Asterix and Obelix as to whether he should be allowed to accompany them on their adventures. However, he is often seen doing something interesting in the background and occasionally fulfills an important part of the plot. In the words of the authors, Dogmatix is the only known "canine ecologist": he loves trees and howls in distress whenever one is damaged. Despite his small size, he is quite fearless. He has drunk The Magic Potion on a number of occasions, but his favourite treat is to 'chew a bone'.