(1) If requested by the client, a veterinarian must provide a written prescription for any medication prescribed by that veterinarian under a valid veterinarian-client-patient relationship.

(2) As an alternative to a written prescription, if requested by the client, the veterinarian must call or send the prescription by electronic means consistent with state and federal law, to any pharmacy of the client's choosing that is licensed under chapter 18.64 RCW.