Talk:List of ponies/@comment-78.133.26.228-20110927104804/@comment-5490610-20110927112254

It's neither explicitly nor implicitly mentioned in the show. The likelihood is even lower when you consider the episode was filled with ponies with Derpy Hoove's mane design with a different color, and that the purple-haired pony wasn't the only one shown leading the birds back to Ponyville. There is no reason to believe any of them are Ditzy Doo, let alone a specific one.