Is it possible to notify a non-ticket owner agent (who has previously also replied to a ticket) when a user sends a response?

Is it possible to notify a non-ticket owner agent (who has previously also replied to a ticket) when a user sends a response?

  1. User (our customer) sends a support request in.
  2. An agent replies - an automatically becomes the ticket owner.
  3. Another agent also replies 
  4. The user replies
  5. A notification is sent BUT only to the owner agent.
Can the user response notification ALSO be sent to any other agents who have responded to the ticket?