Answer: A land dispute between the two families originally starts the feud.
Step-by-step explanation:
The original cause of the feud between Ulrich's and George's families was that the feud begins due to a land dispute between the two families originally starts the feud.
The grandfather of Ulrich won back the land that was illegally gotten by the ancestor of Georg in the court but Georg's family didn't accept the judgement from the court and this resulted in the feud that occured.