Hi Sydney ~ If you subscribed to the iHeartDogs Birthday Club, you should have received an Email asking you to confirm the subscription, at which time you would see birthday products that you can order and pay only shipping & handling. We do offer a birthday cake mix for purchase: https://iheartdogs.com/search/cake/?post_type=product&iid=HeaderSearchBox
I hope this helps. If you have further questions or specific questions regarding your order, please reach out to our customer support team at firstname.lastname@example.org.
Thank you. :)