Who had a horse called dynamite?

There isn't enough information to definitively say who had a horse named Dynamite.

To help me figure this out, could you provide more context? For example:

* What time period are you interested in?

* Is this a real person or a fictional character?

* Do you have any other clues, like a specific sport or profession?

With more information, I can help you find out who owned a horse named Dynamite.