Todd said they don't have it now. But if they wanted too. He said they could support it. Kind of a grey area if you ask me... Personally I hope they don't have it!
I'm pretty damn sure they won't be in. When asked about it at first, Todd said "No, that's not really how we're approaching them." but after many interviews, he has started saying "maybe, we're not doing it right now, but we're looking into it.". I think that's just to appease the incessant dragon riding fans who won't shut up about it and quit asking.