As a novice, my understanding is that whippets should have a daisy cutting action - as required in show ponies for instance - and good front extension. They need to have their hocks under them to drive the movement foreward from behind - again something that is needed in horses. I know that I'm certainly looking for the same impulsion in a whippet as I am in a horse moving correctly - so I feel there are many similarities. I think they would track up - but someone more knowledgable could answer your question in greater detail.