Speak to me of the difference

[Taqroy]

Between training a terrier and a herding breed. Specifically, how to stop a terrier from continually repeating the same behavior even after redirection (such as chewing on stuff that does not belong in their mouth). I swear I have not had this problem with Mu or Tipper or any herding mix foster - at most they'll do the behavior twice and then stop. Help me understand the twists and turns of the terrier mindset.