Well, one slightly crackpot theory here - human/pony inter-breeding! xD Yep, so that’s why this pic is of Danny Williams making an honest pony of his long-time mare-friend Surprise, after already having had a daughter with her. Don’t ask me, and I promise I won’t tell you how he did it. ;)
Their daughter, the little redheaded pony holding the train of Surprise’s rather lovely wedding dress, is named Bomb Shell (as in, a really big surprise). As you can see, she is able to walk on her hind legs (at least for shortish periods) and holding the dress’ train with her hooves…somehow. And in case you wonder, the ceremony is being officiated over by Majesty, the leader of the ponies (I did also consider Megan for the celebrant. but felt a senior pony would be better for the task).