Talk:Griffon the Brush Off/@comment-90.217.120.254-20120422094420

Probably worth noting that in mythology griffins (pick your spelling) and horses are said to hate each other and fight to the death every time they meet (which is why the hippogriff is an example of an animal that can never happen).

Given the other mythology references in the series it's not a big stretch to say that "griffins and (normal) ponies don't get on" is a nod to that.