User blog comment:Miskos3/Fairy Tail Episode 231: Gray vs. Doriate, Review/@comment-4933386-20150502105036/@comment-83.253.247.186-20150502120948

I thought when this stuff happened in the manga that it was going to turn out that the bird monster was working for Tartarus and was sent to get rid of Doriate but it seems it was just suppose to be a wild animal.

And sorry if im wrong but i dont think Minerva and Doriate ever flew on that bird in the manga so it was maybe something they changed for the anime.