Talk:Ponies/@comment-7033565-20140606044717/@comment-10390252-20140606091846

Definitely. I don't think that the different types of pony are differing sub-species; they're far closer than that - they're races of a common species.

FWIW, the cross-breeding might have a magical component to it too. It's increasingly clear that magic is a vital part of ponies' biology.